uint8_t *nghttp2_cpymem(uint8_t *dest, const void *src, size_t len) {
  if (len == 0) {
    return dest;
  }

  memcpy(dest, src, len);

  return dest + len;
}
uint8_t *nghttp2_cpymem(uint8_t *dest, const void *src, size_t len) {
  if (len == 0) {
    return dest;
  }

  memcpy(dest, src, len);

  return dest + len;
}