public Optional<Long> getExcessBlobGas() {
    return header.getExcessBlobGas().map(BlobGas::toLong);
  }
Returns the excess blob gas of the current block.

@return an Optional containing the excess blob gas of 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