= MenuBarsLoaderService
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Returns the xref:refguide:applib:index/layout/menubars/bootstrap/BSMenuBars.adoc[BSMenuBars] instance (bootstrap3-specific subtype of _org.apache.isis.applib.layout.menubars.MenuBars_ , for the UI.

The default implementation deserializes the `menubars.layout.xml` file read from the classpath.

The service is _called_ by the default implementation of xref:refguide:applib:index/services/menu/MenuBarsService.adoc[MenuBarsService] .

== API

[source,java]
.MenuBarsLoaderService.java
----
interface MenuBarsLoaderService {
  boolean supportsReloading()     // <.>
  BSMenuBars menuBars()     // <.>
}
----

<.> xref:#supportsReloading_[supportsReloading()]
+
--
Whether dynamic reloading of layouts is enabled.
--
<.> xref:#menuBars_[menuBars()]
+
--
Returns a new instance of a xref:refguide:applib:index/layout/menubars/bootstrap/BSMenuBars.adoc[BSMenuBars] if possible, else `null` .
--

== Members

[#supportsReloading_]
=== supportsReloading()

Whether dynamic reloading of layouts is enabled.

If not, then the calling xref:refguide:applib:index/services/menu/MenuBarsService.adoc[MenuBarsService] will cache the layout once loaded.

[#menuBars_]
=== menuBars()

Returns a new instance of a xref:refguide:applib:index/layout/menubars/bootstrap/BSMenuBars.adoc[BSMenuBars] if possible, else `null` .

include::hooks/MenuBarsLoaderService_010-implementation.adoc[]

include::hooks/MenuBarsLoaderService_020-examples-and-usage.adoc[]
