code: function(value, sendUpdatedEvt) {
  		// + check : if Null or Undefined we put '' in the stringField
  		this.el.value = ( lang.isNull(value) || lang.isUndefined(value) ) ? '' : value;
  
        // call parent class method to set style and fire updatedEvt
        inputEx.StringField.superclass.setValue.call(this, value, sendUpdatedEvt);
     }
docs: Function to set the value
  @param {String} value The new value
  @param {boolean} [sendUpdatedEvt] (optional) Wether this setValue should fire the updatedEvt or not (default is true, pass false to NOT send the event)