<?php
  
  namespace Illuminate\Contracts\Routing;
  
  interface BindingRegistrar
  {
      /**
       * Add a new route parameter binder.
       *
       * @param  string  $key
       * @param  string|callable  $binder
       * @return void
       */
      public function bind($key, $binder);
  
      /**
       * Get the binding callback for a given binding.
       *
       * @param  string  $key
       * @return \Closure
       */
      public function getBindingCallback($key);
  }