apollo-core/src/main/java/com/ctrip/framework/foundation/internals/io/ByteOrderMark.java/ByteOrderMark/hashCode
class ByteOrderMark:  @Override
  public int hashCode() {
    int hashCode = getClass().hashCode();
    for (final int b : bytes) {
      hashCode += b;
    }
    return hashCode;
  }