code: function(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;
  		}
docs: Returns the data object with the given key