/**
* @param AbstractType $abstractType
* @return ObjectType[]
*/
public function getPossibleTypes(AbstractType $abstractType)
{
if ($abstractType instanceof UnionType) {
return $abstractType->getTypes();
}
Utils::invariant($abstractType instanceof InterfaceType);
return isset($this->implementations[$abstractType->name]) ? $this->implementations[$abstractType->name] : [];
}