freedive/lib/freedive_web/live/liliform_live.ex

defmodule FreediveWeb.LiliformLive do
  defmacro __using__(opts) do
    quote location: :keep, bind_quoted: [opts: opts] do
      use FreediveWeb, :live_view
      @behaviour FreediveWeb.LiliformLive

      def mount(_params, _session, socket) do
        socket = assign(socket, :opts, unquote(opts))
        socket = assign(socket, :items, items())
        {:ok, socket}
      end
    end
  end

  @callback items() :: [map]
end