/**
* Delete document for model from index.
*
* @param Model $model
*/
public function delete(Model $model)
{
list($uidName, $uidValue) = $this->config->classUidPair($model);
list($pkName, $pkValue) = $this->config->primaryKeyPair($model);
$this->index()->del($uidValue . '_' . $pkValue);
// delete document from index by ID of hit.
}
