multiSend() :
This function is used to send multiple transactions in a single call. It takes in an array of bytes as an argument, which contains the details of the transactions to be sent. It then iterates through the array, extracting the details of each transaction such as the operation, the address to send to, the value, the data length, and the data. It then calls the appropriate function depending on the operation, and if the call is successful, it moves on to the next transaction. If the call is unsuccessful, it reverts the transaction. (autogenerated documentation)