Cinema has the concept of the gear icon which let's you open a little dialog for commands to change something that you maybe would only do occassionally. This is visible in a variety of areas such as the Mesh>Add>Subdivide for instance.

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Is there any information about best practices for doing something like this? I am sorry this is a bit vague. Is it just a matter of having the script/command plugin, and then a second script/command plugin for the the settings dialog that maybe writes something that the first script references when running? Or is there some proper way to write a command with the setting icon option? I feel like there has to be some way, because if I were to do it as two separate scripts/plugins, they'd have two different entries, in the Extensions menu, right? Which is not what is desired.