code: function(address, force) {
          var result;
  
          if (force) {
              this.focusModel.finishEditing();
          }
  
          result = this.focusModel.startEditing(address.rowKey, address.columnName);
  
          if (result) {
              this.selectionModel.end();
          }
  
          return result;
      }
docs: Starts editing a cell identified by a given address, and returns the result.
  @param {{rowKey:String, columnName:String}} address - cell address
  @param {Boolean} force - if set to true, finish current editing before start.
  @returns {Boolean} true if succeeded, false otherwise