…ged collection (deguif, XuruDragon)This PR was merged into the 4.3-dev branch.Discussion----------[DependencyInjection] Allow to choose an index for tagged collection| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets |#29203| License       | MIT| Doc PR        |symfony/symfony-docs#11009This is the continuity of the PR#29598Add a way to specify an index based on a tag attribute when injecting a tag collection into services, but also a a way to fallback to a static method on the service class.```yamlservices:  foo_service:    class: Foo    tags:      - foo  foo_service_tagged:    class: Bar    arguments:      - !tagged          tag: 'foo'          index_by: 'tag_attribute_name'          default_index_method: 'static_method'``````xml<?xml version="1.0" ?><container xmlns="http://symfony.com/schema/dic/services"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://symfony.com/schema/dic/serviceshttp://symfony.com/schema/dic/services/services-1.0.xsd">  <services>    <service>        <tag name="foo_tag" />    </service>    <service public="true">      <argument type="tagged" tag="foo_tag" index-by="tag_attribute_name" default-index-method="static_method" />    </service>  </services></container>```Tasks* [x]  Support PHP loader/dumper* [x]  Support YAML loader/dumper* [x]  Support XML loader/dumper (and update XSD too)* [x]  Add tests* [x]  DocumentationCommits-------101bfd7 [DI] change name to tag + add XMl support + adding yaml/xml tests845d3a6 Allow to choose an index for tagged collection

…or service in an injected service locator argument (XuruDragon, nicolas-grekas)This PR was merged into the 4.3-dev branch.Discussion----------[DependencyInjection] Add ability to define an index for service in an injected service locator argument| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets | n/a| License       | MIT| Doc PR        | in progress /  symfony/symfony-docs#...It's more or less the same thing then the PR#30257 but for a service locator argumentAdd a simple way to specify an index based on a tag attribute to simplify retrieving a specific service when injecting a service locator as argument into services, but also a way to fallback to a static method on the service class.Yaml:```yamlservices:  foo_service:    class: Foo    tags:      - {name: foo_tag, key: foo_service}  foo_service_tagged:    class: Bar    arguments:      - !tagged_locator          tag: 'foo_tag'          index_by: 'key'          default_index_method: 'static_method'```XML:```xml<?xml version="1.0" ?><container xmlns="http://symfony.com/schema/dic/services"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://symfony.com/schema/dic/serviceshttp://symfony.com/schema/dic/services/services-1.0.xsd">  <services>    <service>        <tag name="foo_tag" key="foo_service" />    </service>    <service public="true">      <argument type="tagged_locator" tag="foo_tag" index-by="key" default-index-method="static_method" />    </service>  </services></container>```PHP:```php// config/services.phpuse Symfony\Component\DependencyInjection\Argument\TaggedIteratorArgument;use Symfony\Component\DependencyInjection\Argument\ServiceLocatorArgument;$container->register(Foo::class)        ->addTag('foo_tag', ['key' => 'foo_service']);$container->register(App\Handler\HandlerCollection::class)         // inject all services tagged with app.handler as first argument         ->addArgument(new ServiceLocatorArgument(new TaggedIteratorArgument('app.handler', 'key')));```Usage:```php// src/Handler/HandlerCollection.phpnamespace App\Handler;use Symfony\Component\DependencyInjection\ServiceLocator;class HandlerCollection{     public function __construct(ServiceLocator $serviceLocator)     {           $foo = $serviceLocator->get('foo_service'):     }}```Tasks* [x]  Support PHP loader/dumper* [x]  Support YAML loader/dumper* [x]  Support XML loader/dumper (and update XSD too)* [x]  Add tests* [x]  DocumentationCommits-------cb3c56b Support indexing tagged locators by FQCN as fallback250a2c8 [DI] Allow tagged_locator tag to be used as an argument

…or service locators (Anthony MARTIN)This PR was submitted for the master branch but it was merged into the 4.3 branch instead (closes#11042).Discussion----------[DependencyInjection] Doc for Allow to choose an index for service locatorsHere is the doc for the new feature implemented in : [symfony/symfony#30348](symfony/symfony#30348) that follow the feature [symfony/symfony#30257](symfony/symfony#30257)Commits-------d63c298 [DependencyInjection] Doc for Allow to choose an index for service locator collection

…n index for tagged collection (Anthony MARTIN)This PR was submitted for the master branch but it was merged into the 4.4 branch instead.Discussion----------[DependencyInjection] Doc for #30257 Allow to choose an index for tagged collectionHere is the doc for the new feature implemented in :symfony/symfony#30257Commits-------980b3d3 [DependencyInjection] Doc for #30257 Allow to choose an index for tagged collection