code: def get_merkle_root(block_representation, coin_symbol='btc', api_key=None):
      '''
      Takes a block_representation and returns the merkle root
      '''
      return get_block_overview(block_representation=block_representation,
              coin_symbol=coin_symbol, txn_limit=1, api_key=api_key)['mrkl_root'f get_merkle_root(block_representation, coin_symbol='btc', api_key=None):
      '''
      Takes a block_representation and returns the merkle root
      '''
      return get_block_overview(block_representation=block_representation,
              coin_symbol=coin_symbol, txn_limit=1, api_key=api_key)['mrkl_root']
docs: Takes a block_representation and returns the merkle root