<?php
 
 namespace Illuminate\Contracts\Database;
 
 class ModelIdentifier
 {
     /**
      * The class name of the model.
      *
      * @var string
      */
     public $class;
 
     /**
      * The unique identifier of the model.
      *
      * This may be either a single ID or an array of IDs.
      *
      * @var mixed
      */
     public $id;
 
     /**
      * The relationships loaded on the model.
      *
      * @var array
      */
     public $relations;
 
     /**
      * The connection name of the model.
      *
      * @var string|null
      */
     public $connection;
 
     /**
      * Create a new model identifier.
      *
      * @param  string  $class
      * @param  mixed  $id
      * @param  array  $relations
      * @param  mixed  $connection
      * @return void
      */
     public function __construct($class, $id, array $relations, $connection)
     {
         $this->id = $id;
         $this->class = $class;
         $this->relations = $relations;
         $this->connection = $connection;
     }
 }