protected function compileClassHeader(Twig_Compiler $compiler) {
$compiler
->write("\n\n")
->write("/* " . str_replace('*/', '* /', $this
->getAttribute('filename')) . " */\n")
->write('class ' . $compiler
->getEnvironment()
->getTemplateClass($this
->getAttribute('filename'), $this
->getAttribute('index')))
->raw(sprintf(" extends %s\n", $compiler
->getEnvironment()
->getBaseTemplateClass()))
->write("{\n")
->indent();
}