<?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;
      }
  }