code: function getOpenPRs(auth, repo, debugEnabled) {
    setDebugMode(debugEnabled);
    return authenticate(auth)
      .then(function () {
        return getPRsForRepo(repo)
          .then(getLabels, handleError('getPRs'))
          .then(getDiffs, handleError('getLabels'));
      }, handleError('authenticate'));
  }
docs: Get a list of all open pull requests.
  @param  {Object}  auth         Credentials containing an auth token
  @param  {Object}  repo         The repo from which to get the Open PRs
  @param  {Boolean} debugEnabled Set the debug state
  @return {Promise}              Resolves to a list of all open pull-requests