code: function findExternalOrigin(issuer) {
    if (!_.isNil(issuer) && _.startsWith(issuer.rawRequest, './')) {
      return findExternalOrigin(issuer.issuer);
    }
    return issuer;
  }
docs: Find the original module that required the transient dependency. Returns
  undefined if the module is a first level dependency.
  @param {Object} issuer - Module issuer