code: function getActors (filePath) {
    if (fs.existsSync(filePath)) {
      return glob(filePath, [ '*_actor.js' ])
    } else {
      let error = `Could not load actors from non-existent path '${filePath}'`
      log.error(error)
      return Promise.reject(new Error(error))
    }
  }
docs: returns a list of resource files from a given parent directory