Retrieves the StartupWMClass field from @info. This represents the WM_CLASS property of the main window of the application, if launched through @info.
the startup WM class, or %NULL if none is set in the desktop file.
2.34
See Implementation
Retrieves the StartupWMClass field from @info. This represents the WM_CLASS property of the main window of the application, if launched through @info.