protected abstract ReferenceOperationResultType OnColumnsInserted(int insertAt, int count, RowColumnGridOps ops);
protected abstract ReferenceOperationResultType OnRowsRemoved(int removeAt, int count, RowColumnGridOps ops);
protected override ReferenceOperationResultType OnRowsInserted(int insertAt, int count, RowColumnGridOps ops) { return(ops.OnRowColumnInsert(insertAt, count)); }
protected override ReferenceOperationResultType OnRowsRemoved(int removeAt, int count, RowColumnGridOps ops) { return(ops.OnRowColumnDelete(removeAt, count)); }
protected override ReferenceOperationResultType OnColumnsRemoved(int removeAt, int count, RowColumnGridOps ops) { return(ReferenceOperationResultType.Affected); }