/**
  * @see \Components\Io_Buffer::appendBuffer() \Components\Io_Buffer::appendBuffer()
  *
  * @return \Components\Io_Buffer_Byte
  */
 public function appendBuffer(Io_Buffer $source_)
 {
     $remaining = min($this->remaining(), $source_->remaining());
     for ($i = 0; $i < $remaining; $i++) {
         $this->append($source_->next());
     }
     return $this;
 }