ValidateEnvPlaceholdersPass example

        $container->compile(true);

        $this->assertSame('1', $container->getParameter('boolish'));
    }

    private function doProcess(ContainerBuilder $container): void
    {
        (new MergeExtensionConfigurationPass())->process($container);
        (new RegisterEnvVarProcessorsPass())->process($container);
        (new ValidateEnvPlaceholdersPass())->process($container);
    }
}

class EnvConfiguration implements ConfigurationInterface
{
    public function getConfigTreeBuilder(): TreeBuilder
    {
        $treeBuilder = new TreeBuilder('env_extension');
        $treeBuilder->getRootNode()
            ->children()
                ->scalarNode('scalar_node')->end()
                

new RegisterAutoconfigureAttributesPass(),
                new AutowireAsDecoratorPass(),
                new AttributeAutoconfigurationPass(),
                new ResolveInstanceofConditionalsPass(),
                new RegisterEnvVarProcessorsPass(),
            ],
            -1000 => [new ExtensionCompilerPass()],
        ];

        $this->optimizationPasses = [[
            new AutoAliasServicePass(),
            new ValidateEnvPlaceholdersPass(),
            new ResolveDecoratorStackPass(),
            new ResolveChildDefinitionsPass(),
            new RegisterServiceSubscribersPass(),
            new ResolveParameterPlaceHoldersPass(false, false),
            new ResolveFactoryClassPass(),
            new ResolveNamedArgumentsPass(),
            new AutowireRequiredMethodsPass(),
            new AutowireRequiredPropertiesPass(),
            new ResolveBindingsPass(),
            new ServiceLocatorTagPass(),
            new DecoratorServicePass(),
            

new RegisterAutoconfigureAttributesPass(),
                new AutowireAsDecoratorPass(),
                new AttributeAutoconfigurationPass(),
                new ResolveInstanceofConditionalsPass(),
                new RegisterEnvVarProcessorsPass(),
            ],
            -1000 => [new ExtensionCompilerPass()],
        ];

        $this->optimizationPasses = [[
            new AutoAliasServicePass(),
            new ValidateEnvPlaceholdersPass(),
            new ResolveDecoratorStackPass(),
            new ResolveChildDefinitionsPass(),
            new RegisterServiceSubscribersPass(),
            new ResolveParameterPlaceHoldersPass(false, false),
            new ResolveFactoryClassPass(),
            new ResolveNamedArgumentsPass(),
            new AutowireRequiredMethodsPass(),
            new AutowireRequiredPropertiesPass(),
            new ResolveBindingsPass(),
            new ServiceLocatorTagPass(),
            new DecoratorServicePass(),