NewDiscoveryCategoryExpander returns a category expander that makes use of the "categories" fields from the API, found through the discovery client.

NewDiscoveryFilteredExpander returns a category expander that filters the returned groupresources by what the server has available.

LegacyCategoryExpander is the old hardcoded expansion.

SimpleCategoryExpander implements CategoryExpander interface using a static mapping of categories to GroupResource mapping.

CategoryExpander maps category strings to GroupResouces.

UnionCategoryExpander implements CategoryExpander interface.