class Importmap::Map

`cache_key` to vary the cache used by this method for the different cases.
want these resolved paths to use. In case you need to resolve for different asset hosts, you can pass in a custom
`ApplicationController.helpers`. You'll want to use the resolver that has been configured for the `asset_host` you
The `resolver` must respond to `path_to_asset`, such as `ActionController::Base.helpers` or
Returns a JSON hash (as a string) of all the resolved module paths of the pinned packages in the import map format.

def to_json(resolver:, cache_key: :json)
  cache_as(cache_key) do
    JSON.pretty_generate({ "imports" => resolve_asset_paths(expanded_packages_and_directories, resolver: resolver) })
  end
end