参考代码：

function getParameterDefinitions () {
  return ([
    {name: 'x', type: 'float', initial: 30, step: 1, caption: '抽屉长'},
    {name: 'y', type: 'float', initial: 20, step:1, caption: '抽屉宽'},
    {name: 'z', type: 'float', initial: 10, step: 1, caption: '抽屉高'},
    {name: 'h', type: 'float', initial: 1, step: 1, caption: '抽屉厚'},

 {name: 'fk_empty', type: 'choice',caption:'是否空心', initial:0, values: [0, 1], captions:['否','是']}
    ])
}