/**
* Two union types are equal if they have the same number of alternates
* and all alternates are equal.
*/
public function equals(PhpType $that)
{
if ($that->isUnionType()) {
$that = $that->toMaybeUnionType();
if (count($this->alternates) !== count($that->getAlternates())) {
return false;
}
foreach ($that->getAlternates() as $alternate) {
if (!$this->contains($alternate)) {
return false;
}
}
return true;
}
return false;
}