def _istree(obj):
    return isinstance(obj, nltk.tree.Tree)
The TLS handshake is performed when L{TLSMemoryBIOProtocol} is
dataset/ETHPy150Open nltk/nltk/nltk/tgrep.py/_istree--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/protocols/test/test_tls.py/TLSMemoryBIOTests.test_handshake