Fix link to service definitions in documentation

use Symfony\Component\DependencyInjection\Definition;

// finds out if there is an "app.mailer" definition
$container->hasDefinition('app.mailer');
// finds out if there is an "app.mailer" definition or alias
$container->has('app.mailer');

// gets the "app.user_config_manager" definition
$definition = $container->getDefinition('app.user_config_manager');
// gets the definition with the "app.user_config_manager" ID or alias
$definition = $container->findDefinition('app.user_config_manager');

// adds a new "app.number_generator" definition
$definition = new Definition(\App\NumberGenerator::class);
$container->setDefinition('app.number_generator', $definition);

// shortcut for the previous method
$container->register('app.number_generator', \App\NumberGenerator::class);

Author: dmanifestor

service_container/compiler_passes.rst

@@ -2,7 +2,7 @@ How to Work with Compiler Passes
 ================================
 
 Compiler passes give you an opportunity to manipulate other
-:doc:`service definitions </service_container/definitions>` that have been
+:doc:`service definitions </dmanifestor/symfony-docs>` that have been
 registered with the service container.
 
 .. _kernel-as-compiler-pass: