code: @Deprecated
    public static void cloneInto(Writable dst, Writable src) throws IOException {
      ReflectionUtils.cloneWritableInto(dst, src);
    }
docs: Make a copy of the writable object using serialiation to a buffer
  @param dst the object to copy from
  @param src the object to copy into, which is destroyed
  @throws IOException
  @deprecated use ReflectionUtils.cloneInto instead.