src/sap.m/src/sap/m/MultiComboBox.js
function (oEvent) {
				var sValue = this.getValue();
				if (sValue) {
					that.setValue(sValue);
					that._selectItemByKey();
					this.setValue(that._sOldInput);
					that.close();
				}
			}
function (oEvent) {
				var sValue = this.getValue();
				if (sValue) {
					that.setValue(sValue);
					that._selectItemByKey();
					this.setValue(that._sOldInput);
					that.close();
				}
			}
function ( oEvent ) { var sValue = this . getValue ( ) ; if ( sValue ) { that . setValue ( sValue ) ; that . _selectItemByKey ( ) ; this . setValue ( that . _sOldInput ) ; that . close ( ) ; } }
select a list item, when enter is triggered in picker text field
select a list item when enter is triggered in picker text field