@classmethod
def systemGrants(cls):
    """return dictionary of all system grants with their descriptions"""
    import pkgutil
    from importlib import import_module
    from .. import _grants
    result = {}
    for mdata in pkgutil.iter_modules(_grants.__path__):
        mod = import_module(_grants.__package__ + '.' + mdata[1])
        result.update(getattr(mod, 'grants'))
    return result
