Add custom field to plugin manifest file

[Ronny Buelund]

Can anyone lead me in the right direction of how to implement a custom field for a plugin manifest file - the config part - (I fetch data from the db to populate a dropdown) in the correct Joomla 5 way ?

[Viper]

<fieldset name="basic" addfieldprefix="Joomla\Component\Mycomponent\Administrator\Field">...

Or put a custom field under "plugins/plugintype/myplugin/src/Field" folder. Set up proper namespace and use it in "addfieldprefix".