public function environment(string $env, \Closure $callback): RouteCollectionInterface
	{
		if (ENVIRONMENT === $env)
		{
			$callback($this);
		}

		return $this;
	}
public function environment(string $env, \Closure $callback): RouteCollectionInterface
	{
		if (ENVIRONMENT === $env)
		{
			$callback($this);
		}

		return $this;
	}
public function environment ( string $ env , \ Closure $ callback ) : RouteCollectionInterface { if ( ENVIRONMENT === $ env ) { $ callback ( $ this ) ; } return $ this ; }
Limits the routes to a specified ENVIRONMENT or they won't run.

@param string   $env
@param \Closure $callback

@return RouteCollectionInterface
Limits the routes to a specified ENVIRONMENT or they won t run .