How can I make Main Dashboard widgets?

```elixir
defmodule MyApp.Products.ProductAdmin do
def widgets(_schema, _conn) do
[
%{
type: "tidbit",
title: "Average Reviews",
content: "4.7 / 5.0",
icon: "thumbs-up",
width: 6,
}
]
end
end
```
This way, widgets for individual contexts come out well. However, widgets for individual contexts are also visible on the main dashboard. How do I declare a widget only on a dashboard that is different from the widget in the main individual context?