/**
* Adds a new frame to the tag and returns it.
*
* @param ID3_Frame $frame The frame to add.
* @return ID3_Frame
*/
public function addFrame($frame)
{
$frame->setOptions($this->_options);
if (!$this->hasFrame($frame->getIdentifier())) {
$this->_frames[$frame->getIdentifier()] = array();
}
return $this->_frames[$frame->getIdentifier()][] = $frame;
}
