code: function() {
      this.setHelpUrl(Blockly.Msg.LISTS_CREATE_WITH_HELPURL);
      this.setColour(Blockly.Blocks.lists.HUE);
      this.itemCount_ = 3;
      this.updateShape_();
      this.setOutput(true, 'Array');
      this.setMutator(new Blockly.Mutator(['lists_create_with_item']));
      this.setTooltip(Blockly.Msg.LISTS_CREATE_WITH_TOOLTIP);
    }
docs: Block for creating a list with any number of elements of any type.
  @this Blockly.Block