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[fuchsia] mouse-input test (flutter#37221)
Introduces the `mouse-input` test, a straight port from fuchsia.git
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‎shell/platform/fuchsia/flutter/tests/integration/BUILD.gn‎

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testonly = true
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deps = [
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"embedder:tests",
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"mouse-input:tests",
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"text-input:tests",
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"touch-input:tests",
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]

‎shell/platform/fuchsia/flutter/tests/integration/mouse-input/BUILD.gn‎

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# Copyright 2013 The Flutter Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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assert(is_fuchsia)
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import("//build/fuchsia/sdk.gni")
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import("//flutter/tools/fuchsia/fuchsia_archive.gni")
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import("//flutter/tools/fuchsia/gn-sdk/package.gni")
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group("tests") {
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testonly = true
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deps = [ ":mouse-input-test" ]
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}
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executable("mouse-input-test-bin") {
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testonly = true
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output_name = "mouse-input-test"
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sources = [ "mouse-input-test.cc" ]
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# This is needed for //third_party/googletest for linking zircon symbols.
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libs = [ "$fuchsia_sdk_path/arch/$target_cpu/sysroot/lib/libzircon.so" ]
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deps = [
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"$fuchsia_sdk_root/fidl:fuchsia.accessibility.semantics",
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"$fuchsia_sdk_root/fidl:fuchsia.buildinfo",
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"$fuchsia_sdk_root/fidl:fuchsia.component",
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"$fuchsia_sdk_root/fidl:fuchsia.fonts",
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"$fuchsia_sdk_root/fidl:fuchsia.intl",
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"$fuchsia_sdk_root/fidl:fuchsia.kernel",
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"$fuchsia_sdk_root/fidl:fuchsia.memorypressure",
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"$fuchsia_sdk_root/fidl:fuchsia.metrics",
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"$fuchsia_sdk_root/fidl:fuchsia.net.interfaces",
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"$fuchsia_sdk_root/fidl:fuchsia.tracing.provider",
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"$fuchsia_sdk_root/fidl:fuchsia.ui.app",
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"$fuchsia_sdk_root/fidl:fuchsia.ui.input",
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"$fuchsia_sdk_root/fidl:fuchsia.ui.pointerinjector",
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"$fuchsia_sdk_root/fidl:fuchsia.ui.policy",
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"$fuchsia_sdk_root/fidl:fuchsia.ui.scenic",
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"$fuchsia_sdk_root/fidl:fuchsia.ui.test.input",
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"$fuchsia_sdk_root/fidl:fuchsia.ui.test.scene",
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"$fuchsia_sdk_root/fidl:fuchsia.web",
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"$fuchsia_sdk_root/pkg:async",
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"$fuchsia_sdk_root/pkg:async-loop-testing",
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"$fuchsia_sdk_root/pkg:fidl_cpp",
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"$fuchsia_sdk_root/pkg:scenic_cpp",
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"$fuchsia_sdk_root/pkg:sys_component_cpp_testing",
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"$fuchsia_sdk_root/pkg:zx",
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"mouse-input-view:package",
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"//build/fuchsia/fidl:fuchsia.ui.gfx",
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"//flutter/fml",
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"//flutter/shell/platform/fuchsia/flutter/tests/integration/utils:portable_ui_test",
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"//third_party/googletest:gtest",
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"//third_party/googletest:gtest_main",
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]
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}
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fuchsia_test_archive("mouse-input-test") {
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testonly = true
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deps = [
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":mouse-input-test-bin",
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# "OOT" copies of the runners used by tests, to avoid conflicting with the
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# runners in the base fuchsia image.
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# TODO(fxbug.dev/106575): Fix this with subpackages.
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"//flutter/shell/platform/fuchsia/flutter:oot_flutter_jit_runner",
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]
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binary = "$target_name"
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cml_file = rebase_path("meta/$target_name.cml")
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}

‎shell/platform/fuchsia/flutter/tests/integration/mouse-input/README.md‎

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# mouse-input
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`mouse-input-test` exercises mouse input through a child view (in this case, the `mouse-input-view` Dart component) and
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asserting the location as well as what button was used (mouse down, mouse up, wheel, etc) during the event. We do this by
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attaching the child view, injecting mouse input, and validating that the view reports the event back with the expected
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payload.
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```shell
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Injecting the mouse input
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[mouse-input-test.cm] INFO: [portable_ui_test.cc(227)] Injecting mouse input
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View receives the event
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[flutter_jit_runner] INFO: mouse-input-view.cm(flutter): mouse-input-view received input: PointerData(embedderId: 0, timeStamp: 23:18:05.031003, change: PointerChange.add, kind: PointerDeviceKind.mouse, signalKind: PointerSignalKind.none, device: 4294967295, pointerIdentifier: 0, physicalX: 641.4656372070312, physicalY: 402.9313049316406, physicalDeltaX: 0.0, physicalDeltaY: 0.0, buttons: 0, synthesized: true, pressure: 0.0, pressureMin: 0.0, pressureMax: 0.0, distance: 0.0, distanceMax: 0.0, size: 0.0, radiusMajor: 0.0, radiusMinor: 0.0, radiusMin: 0.0, radiusMax: 0.0, orientation: 0.0, tilt: 0.0, platformData: 0, scrollDeltaX: 0.0, scrollDeltaY: 0.0, panX: 0.0, panY: 0.0, panDeltaX: 0.0, panDeltaY: 0.0, scale: 0.0, rotation: 0.0)
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Successfully received response from view
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[mouse-input-test.cm] INFO: [mouse-input-test.cc(120)] Received MouseInput event
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[mouse-input-test.cm] INFO: [mouse-input-test.cc(207)] Client received mouse change at (641.466, 402.931) with buttons 0.
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[mouse-input-test.cm] INFO: [mouse-input-test.cc(211)] Expected mouse change is at approximately (641, 402) with buttons 0.
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```
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## Running the Test
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Reference the Flutter integration test [documentation](https://github.com/flutter/engine/blob/main/shell/platform/fuchsia/flutter/tests/integration/README.md) at `//flutter/shell/platform/fuchsia/flutter/tests/integration/README.md`
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## Playing around with `mouse-input-view`
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Build Fuchsia with `workstation_eng.qemu-x64`
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```shell
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fx set workstation_eng.qemu-x64 && fx build
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```
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Build flutter/engine
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```shell
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$ENGINE_DIR/flutter/tools/gn --fuchsia --no-lto && ninja -C $ENGINE_DIR/out/fuchsia_debug_x64 flutter/shell/platform/fuchsia/flutter/tests/
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integration/mouse_input:tests
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```
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Start a Fuchsia package server
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```shell
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cd "$FUCHSIA_DIR"
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fx serve
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```
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Publish `touch-input-view`
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```shell
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$FUCHSIA_DIR/.jiri_root/bin/fx pm publish -a -repo $FUCHSIA_DIR/$(cat $FUCHSIA_DIR/.fx-build-dir)/amber-files -f $ENGINE_DIR/out/
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fuchsia_debug_x64/gen/flutter/shell/platform/fuchsia/flutter/tests/integration/mouse-input/mouse-input-view/mouse-input-view/mouse-input-view.far
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```
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Launch Fuchsia emulator in a graphical environment
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```shell
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ffx emu start
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```
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**Before proceeding, make sure you have successfully completed the "Set a Password" screen**
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Add `mouse-input-view`
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```shell
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ffx session add fuchsia-pkg://fuchsia.com/mouse-input-view#meta/mouse-input-view.cm
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```

‎shell/platform/fuchsia/flutter/tests/integration/mouse-input/meta/gtest_runner.shard.cml‎

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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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{
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program: {
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runner: "gtest_runner",
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},
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capabilities: [
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{ protocol: "fuchsia.test.Suite" },
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],
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expose: [
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{
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protocol: "fuchsia.test.Suite",
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from: "self",
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},
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],
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}

‎shell/platform/fuchsia/flutter/tests/integration/mouse-input/meta/mouse-input-test.cml‎

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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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{
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include: [
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"gtest_runner.shard.cml",
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"sys/component/realm_builder_absolute.shard.cml",
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// This test needs both the vulkan facet and the hermetic-tier-2 facet,
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// so we are forced to make it a system test.
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"sys/testing/system-test.shard.cml",
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],
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program: {
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binary: "bin/app",
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},
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use: [
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{
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protocol: [
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"fuchsia.ui.test.input.MouseInputListener",
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]
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}
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],
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offer: [
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{
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// Offer capabilities needed by components in this test realm.
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// Keep it minimal, describe only what's actually needed.
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protocol: [
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"fuchsia.kernel.RootJobForInspect",
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"fuchsia.kernel.Stats",
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"fuchsia.logger.LogSink",
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"fuchsia.scheduler.ProfileProvider",
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"fuchsia.sysmem.Allocator",
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"fuchsia.tracing.provider.Registry",
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"fuchsia.ui.input.ImeService",
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"fuchsia.vulkan.loader.Loader",
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"fuchsia.ui.scenic.Scenic",
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"fuchsia.ui.composition.Allocator",
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"fuchsia.ui.composition.Flatland",
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"fuchsia.ui.test.input.MouseInputListener",
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"fuchsia.intl.PropertyProvider",
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"fuchsia.posix.socket.Provider",
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"fuchsia.ui.pointerinjector.Registry",
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],
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from: "parent",
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to: "#realm_builder",
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},
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{
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directory: "pkg",
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subdir: "config",
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as: "config-data",
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from: "framework",
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to: "#realm_builder",
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},
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],
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}

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