function fnHasMoveAction(oAggregationOverlay, oElement, oRelevantContainer, oPlugin) {
			var oAggregationDTMetadata = oAggregationOverlay.getDesignTimeMetadata();
			var oMoveAction = oAggregationDTMetadata.getAction("move", oElement);
			if (!oMoveAction) {
				return Promise.resolve(false);
			}
			// moveChangeHandler information is always located on the relevant container
			return oPlugin.hasChangeHandler(oMoveAction.changeType, oRelevantContainer);
		}
Checks drop ability for aggregation overlays
@param {sap.ui.dt.Overlay} oAggregationOverlay Aggregation overlay object
@param {sap.ui.dt.ElementOverlay} oMovedOverlay Overlay being moved/added
@param {sap.ui.rta.Plugin} oPlugin RTA plugin calling this method
@param {boolean} [bOverlayNotInDom] Flag defining if overlay is not in DOM
@return {Promise.<boolean>} Promise with true value if overlay can be added to the aggregation overlay or false value if not.
@override