How to use the google-closure-deps.depGraph.Graph function in google-closure-deps

function findTransitiveDeps(
  sortedChunkIds: readonly string[],
  dependencies: readonly depGraph.Dependency[],
  modules: { [id: string]: { inputs: readonly string[]; deps: readonly string[] } }
): Map> {
  const pathToDep = new Map(
    dependencies.map(dep => [dep.path, dep] as [string, depGraph.Dependency])
  );
  const graph = new depGraph.Graph(dependencies);
  const chunkToTransitiveDepPathSet: Map> = new Map();
  sortedChunkIds.forEach(chunkId => {
    const chunkConfig = modules[chunkId];
    const entryPoints = chunkConfig.inputs.map(input =>
      assertNonNullable(
        pathToDep.get(input),
        `entryConfig.paths does not include the inputs: ${input}`
      )
    );
    const depPaths = graph.order(...entryPoints).map(dep => dep.path);
    chunkToTransitiveDepPathSet.set(chunkId, new Set(depPaths));
  });
  return chunkToTransitiveDepPathSet;
}