/**
* Adds a compiler pass.
*
* @param CompilerPassInterface $pass A compiler pass
* @param string $type The type of compiler pass
*
* @return ContainerBuilder The current instance
*
* @api
*/
public function addCompilerPass(CompilerPassInterface $pass, $type = PassConfig::TYPE_BEFORE_OPTIMIZATION)
{
if (null === $this->compiler) {
$this->compiler = new Compiler();
}
$this->compiler->addPass($pass, $type);
$this->addObjectResource($pass);
return $this;
}