fedorov/MultiVolumeExplorer — comment on commit 6b15650d02eafa031c310f1a695e4b0bc5094af8
File: Logic/vtkSlicerVectorImageExplorerLogic.h line 57
By finetjul:

no definition in class declaration.
Can be either inline inline int getNum(int i);
with implementation under the class declaration
or implementation in .cxx file

getNum is not Slicer style compliant (should start with uppercase)
You might prefer a more explicit name:
e.g. GetNumberOfDICOMSeries()
(by reading the code I don't know what number it is.)