code: function checkLabelEnablementPreconditions(oControl) {
  		if (!oControl) {
  			throw new Error("sap.ui.core.LabelEnablement cannot enrich null");
  		}
  		var oMetadata = oControl.getMetadata();
  		if (!oMetadata.isInstanceOf("sap.ui.core.Label")) {
  			throw new Error("sap.ui.core.LabelEnablement only supports Controls with interface sap.ui.core.Label");
  		}
  		var oLabelForAssociation = oMetadata.getAssociation("labelFor");
  		if (!oLabelForAssociation || oLabelForAssociation.multiple) {
  			throw new Error("sap.ui.core.LabelEnablement only supports Controls with a to-1 association 'labelFor'");
  		}
  		//Add more detailed checks here ?
  	}
docs: Checks whether enrich function can be applied on the given control or prototype.