lib/live_view_native_swift_ui/modifiers/navigation/navigation_subtitle.ex
defmodule LiveViewNativeSwiftUi.Modifiers.NavigationSubtitle do
use LiveViewNativePlatform.Modifier
modifier_schema "navigation_subtitle" do
field :subtitle, :string
end
def params(subtitle) when is_binary(subtitle), do: [subtitle: subtitle]
def params(params), do: params
end