code: func (pool *TxPool) Content() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
  	pool.mu.RLock()
  	defer pool.mu.RUnlock()
  
  	// Retrieve all the pending transactions and sort by account and by nonce
  	pending := make(map[common.Address]types.Transactions)
  	for _, tx := range pool.pending {
  		account, _ := types.Sender(pool.signer, tx)
  		pending[account] = append(pending[account], tx)
  	}
  	// There are no queued transactions in a light pool, just return an empty map
  	queued := make(map[common.Address]types.Transactions)
  	return pending, queued
  }
docs: // Content retrieves the data content of the transaction pool, returning all the
  // pending as well as queued transactions, grouped by account and nonce.