public LogsBloomFilter getLogsBloom(final LogsBloomFilter defaultValue) {
      return logsBloom.orElse(defaultValue);
    }
Creates a byte sequence with leading zeros.

@param size The size of the byte array to return
@param zerofill The number of lower-order bytes to fill with zero (creating a smaller big
    endian integer value)
@return the array of bytes.
ethereum/core/src/test-support/java/org/hyperledger/besu/ethereum/core/BlockDataGenerator.java