update OrbitGraphProcessor #28

Job	Run time
Build (RelWithDebInfo-noEigen)	4m 30s
Build (Debug)	3m 54s
Build (RelWithDebInfo)	7m 8s
Build (Release)	2m 17s
Build & Test (RelWithDebInfo + Eigen)	7m 18s
Build & Test (RelWithDebInfo, no Eigen)	7m 37s
Build Docs	2m 29s
	35m 13s

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