public Optional<Long> getBlobGasUsed() {
    return header.getBlobGasUsed();
  }
Returns the blob gas used by the current block.

@return an Optional containing the blob gas used by the current block if it exists, otherwise
    an empty Optional
ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/graphql/internal/pojoadapter/BlockAdapterBase.java