Native methods shouldn't be exported as if they are new types

[niloc132]

Sometimes it can be helpful to create a static private method and mark it with jsinterop to access some global value:

@JsType
public class MyExportedType {
    //...

    @JsType(isNative = true, namespace = JsPackage.GLOBAL)
    public interface PromiseSettled<T> {
        String getStatus();
        Object getReason();
        T getValue();
    }

    @JsMethod(namespace = "Promise", name = "allSettled")
    private static native <V> Promise<PromiseSettled<V>[]> allSettledInternal(IThenable<? extends V>[] promises);
}

However, this ends up creating a new Promise type inside my output, even though the method is native:

	export class Promise {
		static allSettled<V>(promises:IThenable<unknown>[]):Promise<PromiseSettled<V>[]>;
	}

Workaround:

Move the single private method to its own class, or any other type that isn't meant to be exported

@JsType
public class MyExportedType {
    //...

    @JsType(isNative = true, namespace = JsPackage.GLOBAL)
    public interface PromiseSettled<T> {
        String getStatus();

        Object getReason();

        T getValue();
    }

    private static class PromiseHelper {
        @JsMethod(namespace = "Promise", name = "allSettled")
        private static native <V> Promise<PromiseSettled<V>[]> allSettledInternal(IThenable<? extends V>[] promises);
    }