def get_all
      instances = features.map { |key| Flipper::Feature.new(key, self) }
      get_multi(instances)
    end
def get_all
      instances = features.map { |key| Flipper::Feature.new(key, self) }
      get_multi(instances)
    end
Public: Get all features and gate values in one call. Defaults to one call
 to features and another to get_multi. Feel free to override per adapter to
 make this more efficient.