def METHOD_NAME(user, page):
    """
    This predicate checks whether the given user is a member of the page's responsible organization.
    :param user: The user who's permission should be checked
    :type user: ~django.contrib.auth.models.User
    :param page: The requested page
    :type page: ~integreat_cms.cms.models.pages.page.Page
    :return: Whether or not ``user`` is a member of ``page.organization``
    :rtype: bool
    """
    if not page or not page.id or not page.organization:
        return False
    return user in page.organization.members.all()