def getBrowserId(create=1):
    """Return a browser id for the current request.

        o If create is false, return None if there is no browser id associated
          with the current request.

        o If create is true, return a newly-created browser id if
          there is no browser id associated with the current request.

        o This method is useful in conjunction with 'getBrowserIdName' if you
          wish to embed the browser-id-name/browser-id combination as a hidden
          value in a POST-based form.

        o The browser id is opaque, has no business meaning, and its length,
          type, and composition are subject to change.

        o Permission required: Access contents information

        o Raises BrowserIdManagerErr if an ill-formed browser id
          is found in REQUEST.
        """
