Defining multiple `buildx.cacheFrom`

[ggjulio]

Description

I'm trying to setup a shared cache using cache-from and cache-to on a repo.

The docker doc says that we can use multiple caches.

• https://docs.docker.com/build/cache/backends/#multiple-caches

But with the plugin I did not found a way to declare more that one cacheFrom for buildx.
Is it possible to do so ?

<!-- [...] redacted -->
<buildx>
	<platforms>
	     <platform>${docker.platforms}</platform>
	</platforms>
	<cacheTo>type=registry,ref=${docker.cache.registry}/my-image:${git.branch}</cacheTo>
	<cacheFrom>type=registry,ref=${docker.cache.registry}/my-image:${git.branch}</cacheFrom>
	<!-- the last cacheFrom overrides the first definition -->
	<cacheFrom>type=registry,ref=${docker.cache.registry}/my-image:master</cacheFrom>
</buildx>
<!-- [...] redacted  -->

Similarly to docker.cacheFrom.idx I also tried declaring a property list docker.buildx.cacheFrom.idx:

<buildx>
	<platforms>
	     <platform>${docker.platforms}</platform>
	</platforms>
	<cacheTo>type=registry,ref=${docker.cache.registry}/my-image:${git.branch}</cacheTo>
       <!-- Prop list does not work for buildx cachefrom
       Unable to parse configuration of mojo io.fabric8:docker-maven-plugin:0.45.0:build for parameter cacheFrom.1: Cannot find  'cacheFrom.1' in class io.fabric8.maven.docker.config.BuildXConfiguration  -->
	<cacheFrom.1>type=registry,ref=${docker.cache.registry}/my-image:${git.branch}</cacheFrom.1>
	<cacheFrom.2>type=registry,ref=${docker.cache.registry}/my-image:master</cacheFrom.2>
</buildx>