if ( !aGroupOp->_is_nil() ) {
// mainShape is an existing servant => GEOM_Object_var not GEOM_Object_wrap
GEOM::GEOM_Object_var mainShape = aGroupOp->GetMainShape( geom );
if ( !aGroupOp->_is_nil() ) {
// mainShape is an existing servant => GEOM_Object_var not GEOM_Object_wrap
GEOM::GEOM_Object_var mainShape = aGroupOp->GetMainShape( geom );