code: function() {
      this.jsonInit({
        "message0": Blockly.Msg.LOOKS_CHANGESIZEBY,
        "args0": [
          {
            "type": "field_dropdown",
            "name": "TYPE",
            "options": [
              [Blockly.Msg.LOOKS_SETSIZETO_SIZE, 'size'],
              [Blockly.Msg.LOOKS_SETSIZETO_STRETCH_X, 'stretch x'],
              [Blockly.Msg.LOOKS_SETSIZETO_STRETCH_Y, 'stretch y']
            ]
          },
          {
            "type": "input_value",
            "name": "CHANGE"
          }
        ],
        "category": Blockly.Categories.looks,
        "extensions": ["colours_looks", "shape_statement"]
      });
    }
docs: Block to change size
  @this Blockly.Block