code: function() {
      this.setHelpUrl(Blockly.Msg.VARIABLES_GET_HELPURL);
      this.setColour(Blockly.Blocks.variables.HUE);
      this.appendDummyInput()
          .appendField(new Blockly.FieldVariable(
          Blockly.Msg.VARIABLES_DEFAULT_NAME), 'VAR');
      this.setOutput(true);
      this.setTooltip(Blockly.Msg.VARIABLES_GET_TOOLTIP);
      this.contextMenuMsg_ = Blockly.Msg.VARIABLES_GET_CREATE_SET;
    }
docs: Block for variable getter.
  @this Blockly.Block