@APPIDENTIFIER id$
com.airsoftsoftwair.hollywood. This can be done
using the @APPIDENTIFIER preprocessor command.
On Linux, the identifier you specify here will be set as the X11 WM_CLASS identifier
for your app. You can then set this identifier in the StartupWMClass tag to
refer to your app when you create a *.desktop file for your app.
Also, when compiling application bundles for macOS, the identifier specified
in @APPIDENTIFIER will automatically be written to the Info.plist file of
the app bundle.