\Illuminate\Database\Eloquent\Concerns\HasAttributes::originalIsEquivalent object cast comparison

Example.php

class Ticket extends Model {
      protected $casts = [
        'content' => 'object',
    ];
}

$ticket = new Ticket();
$ticket->content = \json_decode('{"key":""}');
$ticket->save();

var_dump($ticket->refresh()->content); // object(stdClass)#1 (1) { ["key"]=> string(0) "" }

$ticket = new Ticket();
$ticket->content = \json_decode('{"key":null}');
$ticket->save(); // No attributes are considered Dirty

var_dump($ticket->refresh()->content); // object(stdClass)#1 (1) { ["key"]=> string(0) "" }