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Interface that supports optimizing for axis model to return visible element count.
public interface IOptimizedSheetAxisModelSupport2 : IOptimizedSheetAxisModelSupportPublic Interface IOptimizedSheetAxisModelSupport2
    Inherits IOptimizedSheetAxisModelSupport| Name | Description | 
|---|---|
| SetDirty() | Indicates that the row count and/or column count in the models has changed. |