code: function(sEntityset, mEntitySets) {
  			var aSemanticKey = [];
  			for (var annotationsProperty in this._oDraftMetadata.annotations) {
  				if (annotationsProperty.lastIndexOf(mEntitySets[sEntityset].type) > -1) {
  					aSemanticKey = this._oDraftMetadata.annotations[annotationsProperty][this._oConstants.COM_SAP_VOCABULARIES_COMMON_V1_SEMANTICKEY] || [];
  					break;
  				}
  			}
  			var aSemanticKeys = [];
  			var element;
  			for (var i = 0; i < aSemanticKey.length; i++) {
  				element = aSemanticKey[i];
  				for (var key in element) {
  					aSemanticKeys.push(element[key]);
  				}
  			}
  			return aSemanticKeys;
  		}
docs: Returns an array with key of the corresponding "draft-less" entity type
  @param {string} sEntityset name of the entityset
  @param {object} mEntitySets
  @return {object} array with key of the corresponding "draft-less" entity type