minor #5280 Rebase #4633 (seangallavan)

This PR was submitted for the 2.7 branch but it was merged into the 2.3 branch instead (closes #5280). Discussion ---------- Rebase #4633 Original description: > Simple change...would have saved me several hours of guessing. Commits ------- 9de2017 Update data_collector.rst
symfony · May 23, 2015 · 2fc4b10 · 2fc4b10
2 parents f6db30e + 9de2017
commit 2fc4b10
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/cookbook/profiler/data_collector.rst b/cookbook/profiler/data_collector.rst
@@ -208,3 +208,8 @@ AcmeDebugBundle:
                 'id'       => 'your_collector_name',
             ))
         ;
+
+.. caution::
+
+    Make sure the ``id`` attribute is the same string you used for the
+    ``getName()`` method.