code: void persist() {
          getPreferences(EvernoteSession.getInstance().getApplicationContext())
                  .edit()
                  .putString(KEY_AUTH_TOKEN, mAuthToken)
                  .putString(KEY_NOTESTORE_URL, mNoteStoreUrl)
                  .putString(KEY_WEB_API_URL_PREFIX, mWebApiUrlPrefix)
                  .putString(KEY_EVERNOTE_HOST, mEvernoteHost)
                  .putInt(KEY_USER_ID, mUserId)
                  .putBoolean(KEY_IS_APP_LINKED_NOTEBOOK, mIsAppLinkedNotebook)
                  .apply();
      }
docs: /*package