WeChat.ServerMessage.EventHandler.handle_event_json

You're seeing just the function handle_event_json, go back to WeChat.ServerMessage.EventHandler module for more information.
Link to this function

handle_event_json(params, body, client)

Specs

handle_event_json(params(), body :: String.t(), WeChat.client()) ::
  {:ok, data_type(), json()} | {:error, String.t()}