Nothing cols fixes#1551

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Jolanrensen wants to merge 7 commits intomasterfrom

Commits on Nov 6, 2025

Fixed hasFormattedColumns Issue #1546, added note to colsOf, improve performance of allNulls() in some cases
Jolanrensen
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`DataColumn.empty()` now creates a column of type `Nothing`. More accurate than `Unit` as getting something out of this column will always result in an exception, not "just run", like `Unit` does. …
Jolanrensen
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Provide helpful error message in `update` operation. Found in issue #1546
Jolanrensen
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added update tests with new exception and nothing column
Jolanrensen
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migrated Column DataCollector to use typeOf instead of ::class, and added redundancy checks for nothing types in column creation
Jolanrensen
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Commits on Nov 7, 2025