def get_message(self, envelope):
        
        stripped = self._stripEnvelope(envelope)
        normalized = self._bnormal(stripped)
        canonical = self._buildCanonicalString(normalized)
        hashedDigest = self._hash(canonical)
        
        return hashedDigest
Sets the closability status for the tab. A closable tab can be
dataset/ETHPy150Open jimklo/LRSignature/src/LRSignature/sign/Sign.py/Sign_0_21.get_message--crossover with--dataset/ETHPy150Open rwl/muntjac/muntjac/ui/tab_sheet.py/ITab.setClosable