Split graph and function_node impls into separate files.
Test
run_tests
-- Build files have been written to: /builds/gitlab/las3/development/scheduling/predictable_parallel_patterns/cmake-build-release
Scanning dependencies of target pls
make[2]: *** No rule to make target 'lib/pls/CMakeFiles/pls.dir/build'. Stop.
make[1]: *** [lib/pls/CMakeFiles/pls.dir/all] Error 2
CMakeFiles/Makefile2:104: recipe for target 'lib/pls/CMakeFiles/pls.dir/all' failed
Makefile:140: recipe for target 'all' failed
make: *** [all] Error 2
./ci_scripts/run_tests.sh: line 9: ./bin/tests: No such file or directory
ERROR: Job failed: exit code 1