code: def commit_batch(self, three_pc_batch, prev_handler_result=None):
          
  
          return self._commit(self.ledger, self.state, three_pc_batch)
docs: :param txn_count: The number of requests to commit (The actual requests
          are picked up from the uncommitted list from the ledger)
          :param state_root: The state trie root after the txns are committed
          :param txn_root: The txn merkle root after the txns are committed
  
          :return: list of committed transactions