Where can I find wayland-plasma-shell-client-protocol.h

[Fusion Future]

I was studying kwayland/src/client/plasmashell.cpp, but a header file
named `wayland-plasma-shell-client-protocol.h` is missing.

I ran `zypper se -f wayland-plasma-shell-client-protocol.h` and found
that kwayland-debugsource is the package that provides the file. But
the file is empty.

The question is where can I find wayland-plasma-shell-client-protocol.h?

Thanks in advance.