void message_header::marshall(binary_writer& writer)
{
writer.write((const char*)this, serialized_size());
}
void write_key_value_pair(std::ostream& out, typename super::heap_item item) {
writer.write(out, item->key_, item->val_);
}
void message_header::marshall(binary_writer& writer)
{
writer.write((const char*)this, MSG_HDR_SERIALIZED_SIZE);
}