/**
* Returns the changes partitioned by change type.
*
* @return array An array of type => array of changes.
*/
protected function _partitionByType()
{
$types = Change::types();
$result = array_combine(array_keys($types), array_fill(0, count($types), []));
foreach ($this->_changes as $change) {
$result[$change->getType()][] = $change;
}
return array_filter($result);
}
