@staticmethod
def _split_fqan(fqan):
    """
        gets a fqan and returns a tuple containing
        (vo/groups, role, capability)
        """
    l = fqan.split('/')
    capability = l.pop().split('=')[-1]
    role = l.pop().split('=')[-1]
    vogroup = '/'.join(l)
    return vogroup, role, capability
