snake_case and camelCase in L5 Dispatcher

BusServiceProvider.php

<?php namespace App\Providers;

use App\Bus\Dispatcher;
use Illuminate\Support\ServiceProvider;

class BusServiceProvider extends ServiceProvider {

    /**
     * Bootstrap any application services.
     *
     * @param Dispatcher $dispatcher
     */
	public function boot(Dispatcher $dispatcher)
	{
		$dispatcher->mapUsing(function($command)
		{
			return Dispatcher::simpleMapping(
				$command, 'App\Commands', 'App\Handlers\Commands'
			);
		});
	}

	/**
	 * Register any application services.
	 *
	 * @return void
	 */
	public function register()
	{
        $this->app->singleton('App\Bus\Dispatcher', function($app)
        {
            return new Dispatcher($app, function() use ($app)
            {
                return $app['Illuminate\Contracts\Queue\Queue'];
            });
        });

        $this->app->alias(
            'App\Bus\Dispatcher', 'Illuminate\Contracts\Bus\Dispatcher'
        );

        $this->app->alias(
            'App\Bus\Dispatcher', 'Illuminate\Contracts\Bus\QueueingDispatcher'
        );
	}

}

Dispatcher.php

<?php namespace App\Bus;

use ArrayAccess;
use Illuminate\Bus\Dispatcher as BaseDispatcher;
use ReflectionParameter;

class Dispatcher extends BaseDispatcher {

    protected function extractValueFromSource(ArrayAccess $source, ReflectionParameter $parameter)
    {
        $name = $parameter->name;

        return array_get($source, $parameter->name, array_get($source, snake_case($name)));
    }

}