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== Implementation

The xref:core:runtimeservices:about.adoc[Core Runtime Services] module provides a default implementation of this service, xref:refguide:core:index/runtimeservices/menubars/MenuBarsLoaderServiceDefault.adoc[].
This searches for a classpath resource `menubars.layout.xml`, located in the root package.
Reloading is supported only in prototype mode.

The location of this file (and its name) can be overridden using the xref:refguide:config:sections/causeway.viewer.common.adoc#causeway.viewer.common.application.menubars-layout-file[] configuration property.

For example:

[source,yaml]
.application.yaml
----
causeway:
  viewer:
    common:
      application:
        menubars-layout-file: demoapp/dom/menubars.layout.xml
----

