Remove compiler warnings.
Remove compiler warnings.

ahmadia/AbstractRendering,ahmadia/AbstractRendering,ahmadia/AbstractRendering,JosephCottam/AbstractRendering,ahmadia/AbstractRendering,JosephCottam/AbstractRendering,ahmadia/AbstractRendering,JosephCottam/AbstractRendering,JosephCottam/AbstractRendering,JosephCottam/AbstractRendering