Base class for presenters which display data in virtualized columns.
public abstract class TreeDataGridColumnarPresenterBase<TItem> : TreeDataGridPresenterBase<TItem>, IAvaloniaObjectDebug, INotifyPropertyChanged, IDataContextProvider, ILogical, IThemeVariantHost, IResourceHost, IResourceNode, IStyleHost, ISetLogicalParent, ISetInheritanceParent, ISupportInitialize, INamed, IAvaloniaListItemValidator<ILogical>, IAvaloniaListItemValidator<Visual>, IInputElement, IDataTemplateHost, IVisualBrushInitialize, ISetterValue, IVisualWithRoundRectClip
Implements common layout functionality between TreeDataGridCellsPresenter and TreeDataGridColumnHeadersPresenter.
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