Ash.DataLayer.select

You're seeing just the callback select, go back to Ash.DataLayer module for more information.
Link to this callback

select(data_layer_query, select, resource)

View Source (optional)

Specs

select(data_layer_query(), select :: [atom()], resource :: Ash.Resource.t()) ::
  {:ok, data_layer_query()} | {:error, term()}