Merge branch '6.4' into 7.1

* 6.4:
  [Workflow] Do to talk about workflow, and explain what support option is for

Author: javiereguiluz

components/workflow.rst

@@ -85,41 +85,6 @@ method to initialize the object property::
     // initiate workflow
     $workflow->getMarking($blogPost);
 
-Using The Workflow Registry
----------------------------
-
-When you define multiple workflows you may consider using a ``Registry``,
-which is an object that stores and provides access to different workflows.
-A registry will also help you to decide if a workflow supports the object you
-are trying to use it with::
-
-    use Acme\Entity\BlogPost;
-    use Acme\Entity\Newsletter;
-    use Symfony\Component\Workflow\Registry;
-    use Symfony\Component\Workflow\SupportStrategy\InstanceOfSupportStrategy;
-
-    $blogPostWorkflow = ...;
-    $newsletterWorkflow = ...;
-
-    $registry = new Registry();
-    $registry->addWorkflow($blogPostWorkflow, new InstanceOfSupportStrategy(BlogPost::class));
-    $registry->addWorkflow($newsletterWorkflow, new InstanceOfSupportStrategy(Newsletter::class));
-
-You can then use the registry to get the workflow for a specific object::
-
-    $blogPost = new BlogPost();
-    $workflow = $registry->get($blogPost);
-
-    // initiate workflow
-    $workflow->getMarking($blogPost);
-
-.. caution::
-
-    Beware that injecting the ``Registry`` into your services is **not**
-    recommended. Indeed, it prevents some optimization like lazy-loading
-    from working and could be a performance hog. Instead, you should always
-    inject the workflow you need.
-
 Learn more
 ----------
 

workflow/workflow-and-state-machine.rst

@@ -81,6 +81,7 @@ Below is the configuration for the pull request state machine.
                     marking_store:
                          type: 'method'
                          property: 'currentPlace'
+                    # The "supports" option is useful only if you are using Twig functions ('workflow_*')
                     supports:
                         - App\Entity\PullRequest
                     initial_marking: start
@@ -131,6 +132,7 @@ Below is the configuration for the pull request state machine.
 
                     <framework:marking-store type="method" property="currentPlace"/>
 
+                    <!-- The "supports" option is useful only if you are using Twig functions ('workflow_*') -->
                     <framework:support>App\Entity\PullRequest</framework:support>
 
                     <framework:place>start</framework:place>
@@ -199,6 +201,7 @@ Below is the configuration for the pull request state machine.
 
             $pullRequest
                 ->type('state_machine')
+                // The "supports" option is useful only if you are using Twig functions ('workflow_*')
                 ->supports(['App\Entity\PullRequest'])
                 ->initialMarking(['start']);