refactor!: merge ColumnBase into AbstractColumn#9698
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ColumnBase was a package-private interface whose only implementor was AbstractColumn, and all column types reach its methods by extending AbstractColumn. Move its default methods onto AbstractColumn as concrete methods and drop the interface. The public fluent API on Grid.Column and ColumnGroup is unchanged. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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July 9, 2026 10:52
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ColumnBase is a package-private interface whose only implementor is AbstractColumn, and every column type (Grid.Column, ColumnGroup) gets its methods by extending AbstractColumn anyway. The interface adds a level of abstraction for no real benefit, so this PR proposes to merge it into AbstractColumn.
Warning
This change breaks binary compatibility. ColumnBase's fluent setters returned the self type
Twhose bound was ColumnBase, soTerased to ColumnBase in the compiled bytecode. Now the bound is AbstractColumn, so it erases to AbstractColumn. For example,setResizable's descriptor changes from(Z)Lcom/vaadin/flow/component/grid/ColumnBase;to(Z)Lcom/vaadin/flow/component/grid/AbstractColumn;, and since ColumnBase no longer exists, code compiled against the previous version can now fail with NoSuchMethodError until it's recompiled.