Symfony\Component\DependencyInjection\Dumper\PhpDumper::getServiceCall PHP Method

    private function getServiceCall($id, Reference $reference = null)
    {
        if ('service_container' === $id) {
            return '$this';
        }

        if ($this->container->hasDefinition($id) && !$this->container->getDefinition($id)->isPublic()) {
            // The following is PHP 5.5 syntax for what could be written as "(\$this->services['$id'] ?? \$this->{$this->generateMethodName($id)}())" on PHP>=7.0

            return "\${(\$_ = isset(\$this->services['$id']) ? \$this->services['$id'] : \$this->{$this->generateMethodName($id)}()) && false ?: '_'}";
        }
        if (null !== $reference && ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE !== $reference->getInvalidBehavior()) {
            return sprintf('$this->get(\'%s\', ContainerInterface::NULL_ON_INVALID_REFERENCE)', $id);
        } else {
            if ($this->container->hasAlias($id)) {
                $id = (string) $this->container->getAlias($id);
            }

            return sprintf('$this->get(\'%s\')', $id);
        }
    }