Add RouteCollection::getRouteName

[VincentLanglet]

Subject

I am targeting this branch, because BC.

Currently, I don't see any way to get the routeName of the postAdmin list.
It's computed as sprintf('%s_%s', $this->baseRouteName, $name); in RouteCollection::add and it's done the same way in the AbstractAdmin.

• I would like to avoid writing the same thing in my code, I think the developer should rely in a method instead
• In the Sonata code, it should be implemented only once

I'm not sure about the name of the method and where to put it.

Now you can do $this->admin->getRoutes()->getRouteName('show').
I would have prefer to do $this->admin->getRouteName('show') but then it would be harder to call it in RouteCollection.

Changelog

### Added
- Added `RouteCollection::getRouteName`
- Added `RouteCollectionInterface::getRouteName`

[VincentLanglet]

Friendly ping @sonata-project/contributors :)

[franmomu]

Should be added to RouteCollectionInterface?

[VincentLanglet]

Should be added to RouteCollectionInterface?

Yes indeed, added.

[OskarStark]

Suggested change

	// NEXT_MAJOR: Uncomment the following line.
	// NEXT_MAJOR: Uncomment the following line and remove corresponding @method annotation.

[VincentLanglet]

Done

[VincentLanglet]

Please take a look @OskarStark :) (Or you can dismiss the review @greg0ire, since the change asked was made)

Requested change was applied

[greg0ire]

Thanks @VincentLanglet!