while trying phpstan with laravel to learn strict rules for the model

class Feature extends Model
{
    protected $guarded = [];

    /**
     * @return BelongsToMany<Plan, Feature>
     */
    public function plans(): BelongsToMany
    {
        return $this->belongsToMany(Plan::class);
    }
}

 Method App\Models\Feature::plans() should return                    
         Illuminate\Database\Eloquent\Relations\BelongsToMany<App\Models\Plan,
         App\Models\Feature> but returns                                     
         Illuminate\Database\Eloquent\Relations\BelongsToMany<App\Models\Plan,
         $this(App\Models\Feature)>.                                         
         💡 Template type TDeclaringModel on class                           
            Illuminate\Database\Eloquent\Relations\BelongsToMany is not      
            covariant.

try replacing this:

/**
 * @return BelongsToMany<Plan, Feature>
*/

/**
 * @return BelongsToMany<Plan, $this>
*/

@sharoon thank you so much it worked, but as i checked the docs i did not find this. Where did you get this ?

Masum, I’m glad it worked. Actually I was looking into the source code of Pinkary few days ago, and noticed that update there and it was in my mind and when I saw your error, I just guessed the answer to you.