bool __isset(string $key) Determine if an attribute or relation exists

string path() Get the path to the application "app" directory.

BinaryFileResponse file(SplFileInfo|string $file, array $headers = array())

Collection diffKeys(mixed $items)

string freshTimestampString() Get a fresh timestamp for the model.

TaggedCache tags(array|mixed $names)

$this setObservableEvents(array $observables) Set the observable event

string updatedAt() Get the name of the "updated at" column.

$this delay(DateTime|int|null $delay)

bool isEmpty() Determine if the list of items is empty or not.