/usr/include/spooles/FrontMtx.h is in libspooles-dev 2.2-11.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4
#ifndef _FrontMtx_ #define _FrontMtx_ #include "FrontMtx/FrontMtx.h" #endif