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()}