private static String uint256ToHex(final UInt256Value<?> value) {
    return value == null ? null : formatMinimalValue(value.toMinimalBytes().toShortHexString());
  }
Checks if value is prefixed with '0x'

@param value that is checked
@return true if value is prefixed with '0x', false otherwise
ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/results/Quantity.java