interface Twig_LoaderInterface

interface Twig_LoaderInterface {

  /**
   * Gets the source code of a template, given its name.
   *
   * @param string $name The name of the template to load
   *
   * @return string The template source code
   *
   * @throws Twig_Error_Loader When $name is not found
   */
  public function getSource($name);

  /**
   * Gets the cache key to use for the cache for a given template name.
   *
   * @param string $name The name of the template to load
   *
   * @return string The cache key
   *
   * @throws Twig_Error_Loader When $name is not found
   */
  public function getCacheKey($name);

  /**
   * Returns true if the template is still fresh.
   *
   * @param string    $name The template name
   * @param timestamp $time The last modification time of the cached template
   *
   * @return Boolean true if the template is fresh, false otherwise
   *
   * @throws Twig_Error_Loader When $name is not found
   */
  public function isFresh($name, $time);

}