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nixos/doc/types: note submodules’ default’s behaviour

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Anselm Schüler 2022-04-03 15:12:18 +02:00
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4
nixos/doc/manual/development/option-types.section.md
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@ -308,6 +308,10 @@ The option set can be defined directly
([Example: Directly defined submodule](#ex-submodule-direct)) or as reference
([Example: Submodule defined as a reference](#ex-submodule-reference)).
Note that even if your submodule’s options all have a default value,
you will still need to provide a default value (e.g. an empty attribute set)
if you want to allow users to leave it undefined.
::: {#ex-submodule-direct .example}
::: {.title}
**Example: Directly defined submodule**