const data = {
nodes: [
{ id: 1, group: 1 },
{ id: 2, group: 1 },
{ id: 3, group: 1 },
{ id: 4, group: 1 },
{ id: 5, group: 1 },
{ id: 6, group: 1 },
{ id: 7, group: 1 },
{ id: 8, group: 1 },
{ id: 9, group: 1 }
],
links: [
{ source: 1, target: 2, value: 1 },
{ source: 1, target: 3, value: 1 },
{ source: 2, target: 4, value: 1 },
{ source: 2, target: 5, value: 1 },
{ source: 3, target: 6, value: 1 },
{ source: 3, target: 7, value: 1 },
{ source: 4, target: 8, value: 1 },
{ source: 4, target: 9, value: 1 }
]
};