How to use the @graffy/common.graph function in @graffy/common

function simulateLeave() {
  let delId;
  do {
    delId = Math.floor(Math.random() * id);
  } while (freeIds.has(delId));
  freeIds.add(delId);
  delId = '' + delId;

  const delTs = unwrap(state, ['visitors', delId, 'ts']);
  // console.log('Unwrap', debug(state), ['visitors', delId, 'ts'], delTs);

  leave++;
  return graph(
    {
      visitors: { [delId]: null },
      visitorsByTime: { [delTs]: null },
    },
    ts,
  );
}

function simulateEnter() {
  let addId;
  if (freeIds.size) {
    for (const id of freeIds) {
      addId = id;
      freeIds.delete(addId);
      break;
    }
  } else {
    addId = id++;
  }
  addId = '' + addId;

  enter++;
  return graph(
    {
      visitors: { [addId]: { id: addId, ts, ...visitorInfo() } },
      visitorsByTime: { [ts]: link(['visitors', addId]) },
    },
    ts,
  );
}

function simulateUpdate() {
  let upId;
  do {
    upId = Math.floor(Math.random() * id);
  } while (freeIds.has(upId));
  upId = '' + upId;
  const url = faker.internet.url();
  update++;
  return graph({ visitors: { [upId]: { pageviews: { [ts]: url } } } }, ts);
}