Warning at installation

[rahulpk]

Description of the bug
A warning appears when installing that Markups is needed for the module, but it could not be found.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Install Extensions'
2. Install 'SliverLiver'
3. See error

[RafaelPalomar]

Thanks for the feedback. We will look into this. The error is related to the module `Markups` not being found. The module is part of the core Slicer application, so probably ther is no need to specify it as a requirement. @lassoan, do you have any insight on this? Should we remove the Markups module as dependency for SlicerLiver?

[lassoan]

If your module uses another then your module must return the name of that other module among dependencies of that module (in dependencies() method). These module dependencies are used for determining order for initializing the modules, i.e., to ensure that by the time your module looks for Markups module, the Markups module is already initialized, Markups logic is instantiated, etc..