initRuntime example

                    eval('?>'.$content);
                }

                if (!class_exists($cls, false)) {
                    throw new RuntimeError(sprintf('Failed to load Twig template "%s", index "%s": cache might be corrupted.', $name, $index), -1, $source);
                }
            }
        }

        $this->extensionSet->initRuntime();

        return $this->loadedTemplates[$cls] = new $cls($this);
    }

    /** * Creates a template from source. * * This method should not be used as a generic way to load templates. * * @param string $template The template source * @param string $name An optional name of the template to be used in error messages * * @throws LoaderError When the template cannot be found * @throws SyntaxError When an error occurred during compilation */