def getMissingSymbol(self, input, e, expectedTokenType, follow):

        return None


##     def recoverFromMissingElement(self, input, e, follow):
##         """
##         This code is factored out from mismatched token and mismatched set
##         recovery.  It handles "single token insertion" error recovery for
##         both.  No tokens are consumed to recover from insertions.  Return
##         true if recovery was possible else return false.
##         """
        
##         if self.mismatchIsMissingToken(input, follow):
##             self.reportError(e)
##             return True

##         # nothing to do; throw exception
##         return False
A ProcessManager.is_alive() override that ensures buildroot flags are present in the process
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/antlr3/antlr3/recognizers.py/BaseRecognizer.getMissingSymbol--crossover with--dataset/ETHPy150Open pantsbuild/pants/src/python/pants/java/nailgun_executor.py/NailgunExecutor.is_alive