Check if URL is part of the current project's URLs.

    Args:
        url (str): URL to check.
        default (callable): used to filter out some URLs attached to function.

    Returns:

def url_is_project(url, default='not_a_func'):
    """
    Check if URL is part of the current project's URLs.

    Args:
        url (str): URL to check.
        default (callable): used to filter out some URLs attached to function.

    Returns:

    """
    try:
        u = resolve(url)
        if u and u.func != default:
            return True
    except Resolver404:
        static_url = settings.STATIC_URL
        static_url_wd = static_url.lstrip('/')
        if url.startswith(static_url):
            url = url[len(static_url):]
        elif url.startswith(static_url_wd):
            url = url[len(static_url_wd):]
        else:
            return False
        if finders.find(url):
            return True
    return False