const load = async () => {
  return new Promise(resolve => {
    setTimeout(() => {
      resolve("receive data");
    },3000)
  })
}

interface dataType {
  key: number,
  a?: string,
  b?: string,
  c?: string,
  d?: number,
  hasChildren?: boolean,
  load?: () => void
}

const data: dataType[] = [
  { key: 0, a: '123', hasChildren: true, load: load},
  { key: 1, a: 'cdd', b: 'edd' },
  { key: 2, a: '1333', c: 'eee', d: 2 },
];

const columns = [
  { title: 'title 1', dataIndex: 'a', key: 'a', width: 100 },
  { title: 'title 2', dataIndex: 'b', key: 'b', width: 100 },
  { title: 'title 3', dataIndex: 'c', key: 'c', width: 200 },
];