function findCustomData(element, key) {
		var aData = element.getAggregation("customData");
		if (aData) {
			for (var i = 0; i < aData.length; i++) {
				if (aData[i].getKey() == key) {
					return aData[i];
				}
			}
		}
		return null;
	}
Returns the data object with the given <code>key</code>

@private
@param {sap.ui.core.Element} element The element
@param {string} key The key of the desired custom data
@returns {sap.ui.core.CustomData} The custom data