Actualización

vendor/sonata-project/admin-bundle/Resources/doc/reference/breadcrumbs.rst

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+The breadcrumbs builder
+=======================
+
+The ``sonata.admin.breadcrumbs_builder`` service is used in the layout of every
+page to compute the underlying data for two breadcrumbs:
+
+* one as text, appearing in the ``title`` tag of the document's ``head`` tag;
+* the other as html, visible as an horizontal bar at the top of the page.
+
+Getting the breadcrumbs for a given action of a given admin is done like this:
+
+.. code-block:: php
+
+   <?php
+   $this->get('sonata.admin.breadcrumbs_builder')->getBreadcrumbs($admin, $action);
+
+Configuration
+-------------
+.. configuration-block::
+
+    .. code-block:: yaml
+
+        # app/config/config.yml
+
+        sonata_admin:
+            breadcrumbs:
+               # use this to change the default route used to generate the link to the parent object inside a breadcrumb, when in a child admin
+               child_admin_route: edit