// aPreviewActor holds a map od all sub-shapes of mainShape
SMESH_PreviewActorsCollection* previewActor = mySubSelectWdg->GetActorCollection();
if ( !previewActor ) return false;
// aPreviewActor holds a map od all sub-shapes of mainShape
SMESH_PreviewActorsCollection* previewActor = mySubSelectWdg->GetActorCollection();
if ( !previewActor ) return false;