CallableResolverAwareTrait.php

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<?php
namespace Slim;

use RuntimeException;
use Psr\Container\ContainerInterface;
use Slim\Interfaces\CallableResolverInterface;

trait CallableResolverAwareTrait
{
    protected function resolveCallable($callable)
    {
        if (!$this->container instanceof ContainerInterface) {
            return $callable;
        }

        $resolver = $this->container->get('callableResolver');

        return $resolver->resolve($callable);
    }
}