def isPrefixOf(self, value):
        l = len(self._value)
        if l <= len(value):
            if self._value[:l] == value[:l]:
                return 1
        return 0
Returns true if argument OID resides deeper in the OID tree
dataset/ETHPy150Open kurrik/chrome-extensions/crx-appengine-packager/pyasn1/type/univ.py/ObjectIdentifier.isPrefixOf