/usr/include/x86_64-linux-gnu/zypp/solver/ is in libzypp-dev 15.3.0-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/x86_64-linux-gnu/zypp/solver/detail/
/usr/include/x86_64-linux-gnu/zypp/solver/detail/Helper.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/ProblemSolutionCombi.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/ProblemSolutionIgnore.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/Resolver.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/SATResolver.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/SolutionAction.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/SolverQueueItem.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/SolverQueueItemDelete.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/SolverQueueItemInstall.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/SolverQueueItemInstallOneOf.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/SolverQueueItemLock.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/SolverQueueItemUpdate.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/SystemCheck.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/Testcase.h
/usr/include/x86_64-linux-gnu/zypp/solver/detail/Types.h