def _each_resource_file(config)
      folder = config.folder
      folder.glob("**/*.yml").select(&to_filter_proc(config.file_filter)).each do |file|
        yield file, folder
      end
    end
def _each_resource_file(config)
      folder = config.folder
      folder.glob("**/*.yml").select(&to_filter_proc(config.file_filter)).each do |file|
        yield file, folder
      end
    end
Recursive implementation of `each_resource_file` for each
 folder in the configuration.