def _tgrep_parens_action(_s, _l, tokens):
    # print 'parenthetical tokens: ', tokens
    assert len(tokens) == 3
    assert tokens[0] == '('
    assert tokens[2] == ')'
    return tokens[1]
Tests that the get_missing method of L{models.ExpedientPermissionManager}
dataset/ETHPy150Open nltk/nltk/nltk/tgrep.py/_tgrep_parens_action--crossover with--dataset/ETHPy150Open fp7-ofelia/ocf/expedient/src/python/expedient/common/permissions/tests/tests.py/TestObjectPermissions.test_get_missing