public static Type[] getRCC8Relations(GeometricShapeVariable gv1, GeometricShapeVariable gv2) {
		return getRelations(gv1, gv2, true);		
	}
public static Type [ ] getRCC8Relations ( GeometricShapeVariable gv1 , GeometricShapeVariable gv2 ) { return getRelations ( gv1 , gv2 , true ) ; }
Get the RCC8 relation(s) existing between two {@link GeometricShapeVariable}s.
@param gv1 The first {@link GeometricShapeVariable} (the source of the directed edge).
@param gv2 The second {@link GeometricShapeVariable} (the destination of the directed edge).
@return The RCC8 relation(s) existing between the two given {@link GeometricShapeVariable}s.