code: function _deleteResponsiveFlowLayout( oRFLayout ) {
  
  		if (oRFLayout.__myParentContainerId) {
  			oRFLayout.__myParentContainerId = undefined;
  		}
  		if (oRFLayout.__myParentElementId) {
  			oRFLayout.__myParentElementId = undefined;
  		}
  		oRFLayout.__myParentLayout = undefined;
  
  		oRFLayout.destroy();
  
  	}
docs: /*
  clear variables before delete it