Returns true if rows of the matrix represent Revisions,
i.e. if getRowObjects() returns Revisions.
Either rows, or columns, or both have to represent Work Items.
List of objects that form rows of the matrix. The list has to contain either
only Work Items or only Revisions. Rows and columns may not both contain Revisions.
Returns true if columns of the matrix represent Revisions.
i.e. if getColumnObjects() returns Revisions.
Either rows, or columns, or both have to represent Work Items.
List of objects that form columns of the matrix. The list has to contain either
only Work Items or only Revisions. Rows and columns may not both contain Revisions.