ActivityChange::areBindingsChanged

public function areBindingsChanged(): bool
{
	if (empty($this->getOldBindings())) // assume bindings can not be changed for new activity
	{
		return false;
	}
	$oldBindingsHashes = [];
	$newBindingsHashes = [];
	foreach ($this->getOldBindings() as $binding)
	{
		$oldBindingsHashes[] = $binding->getHash();
	}
	foreach ($this->getNewBindings() as $binding)
	{
		$newBindingsHashes[] = $binding->getHash();
	}
	$removedBindings = array_diff($oldBindingsHashes, $newBindingsHashes);
	$addedBindings = array_diff($newBindingsHashes, $oldBindingsHashes);

	return !empty($removedBindings) || !empty($addedBindings);
}