How to use the dependency-tree.toList function in dependency-tree

let files = buffer.map(file => _.merge(file, {
            dependency_list: deptree.toList(dep_opts(file))
        }));
        // Parse the code

// @ts-ignore
import * as lockFileGen from "@yarnpkg/lockfile"
// @ts-ignore
import * as dependencyTree from "dependency-tree"
// @ts-ignore
import * as detective from "detective-typescript"
// @ts-ignore

import * as semverSort from "semver-sort"

import * as fs from "fs"
import * as path from "path"

// Starting at the runner, generate a list of all the
// files inside the Peril repo which are referenced by the runner
const tree = dependencyTree.toList({
  filename: path.resolve(__dirname, "..", "runner", "run.ts"),
  directory: path.resolve(__dirname, "..", ".."),
})

const filterDefTypes = (fpath: string) => !fpath.endsWith("d.ts")
const onlyModules = (fpath: string) => !fpath.startsWith(".")

// Filter that list down to just source-files
const perilModules = tree.filter(filterDefTypes)

// Now we pull out every node module reference in
// all of the in-app dependencies
let allDeps: string[] = []

// Hide some of the extra stuff
const builtIn = ["fs", "path", "util", "child_process", "http"]

function getDependencyListForComponent(name) {
  const nodeModules = [];
  const dependencies = dependencyTree.toList({
    filename: join(srcPath, 'components', name, 'index.ts'),
    directory: join(srcPath, 'components', name),
    tsConfig: tsConfigPath,
    filter(path) {
      if (path.includes('node_modules')) {
        nodeModules.push(extractPackageNameFromPath(path));
        return false;
      }
      return true;
    },
  });
  return {dependencies, nodeModules};
}

paths.forEach(function(module) {
            let absPath = path.join(options.jsSource, module);

            if (fs.existsSync(absPath)) {
                depTree.toList({
                    filename: absPath,
                    root: options.jsSource,
                    config: './help/tasks/config/paths.json'
                }).forEach(function(item) {
                    tree[item] = true;
                });

                log(module, 1);
            }
        });

paths.forEach(function(module) {
            depTree.toList(path.join(options.js, module), options.js).forEach(function(item) {
                tree[item] = true;
            });

            log(module, 1);
        });

file =>
      (tree[file] = dependencyTree.toList({
        filename: resolve(`./pages/${file}`),
        directory: '/'
      }))
  )