src/PeekAndPoke/Aviator/ServiceContainer/ContainerBase.php
public function has($id)
    {
        if (isset($this->singletons[$id])) {
            return true;
        }

        $methodName = 'get' . Util::mapIdToCamelCase($id);

        return method_exists($this, $methodName);
    }
public function has($id)
    {
        if (isset($this->singletons[$id])) {
            return true;
        }

        $methodName = 'get' . Util::mapIdToCamelCase($id);

        return method_exists($this, $methodName);
    }
@param $id

@return bool