'{}']; protected function casts(): array { return [ 'result' => DeliveryResult::class, 'window_start' => 'immutable_datetime', 'sent_at' => 'immutable_datetime', 'meta' => 'array', ]; } public function event(): BelongsTo { return $this->belongsTo(Event::class); } public function channel(): BelongsTo { return $this->belongsTo(Channel::class); } }