text: import Mock from 'mockjs';
  
  const graphList = {
      nodes: [
          {id: 1, label: 'Node 1'},
          {id: 2, label: 'Node 2'},
          {id: 3, label: 'Node 3'},
          {id: 4, label: 'Node 4'},
          {id: 5, label: 'Node 5'}
        ],
      relations: [
          {from: 1, to: 3},
          {from: 1, to: 2},
          {from: 2, to: 4},
          {from: 2, to: 5},
          {from: 3, to: 3}
        ]
  }
  Mock.mock(/relation\/getGraph/, 'get', graphList);