Compute a type URL for a klass.

    :type klass: type
    :param klass: class to be used as a factory for the given type

    :type prefix: str
    :param prefix: URL prefix for the type

    :rtype: str
    :returns: the URL, prefixed as appropriate

def _compute_type_url(klass, prefix=_GOOGLE_APIS_PREFIX):
    """Compute a type URL for a klass.

    :type klass: type
    :param klass: class to be used as a factory for the given type

    :type prefix: str
    :param prefix: URL prefix for the type

    :rtype: str
    :returns: the URL, prefixed as appropriate
    """
    name = klass.DESCRIPTOR.full_name
    return "%s/%s" % (prefix, name)