/usr/include/JAGS/graph/ is in jags 3.1.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/JAGS/graph/AggNode.h
/usr/include/JAGS/graph/ArrayLogicalNode.h
/usr/include/JAGS/graph/ArrayStochasticNode.h
/usr/include/JAGS/graph/ConstantNode.h
/usr/include/JAGS/graph/DeterministicNode.h
/usr/include/JAGS/graph/Graph.h
/usr/include/JAGS/graph/GraphMarks.h
/usr/include/JAGS/graph/LinkNode.h
/usr/include/JAGS/graph/LogicalNode.h
/usr/include/JAGS/graph/MixtureNode.h
/usr/include/JAGS/graph/Node.h
/usr/include/JAGS/graph/NodeError.h
/usr/include/JAGS/graph/ScalarLogicalNode.h
/usr/include/JAGS/graph/ScalarStochasticNode.h
/usr/include/JAGS/graph/StochasticNode.h
/usr/include/JAGS/graph/VSLogicalNode.h
/usr/include/JAGS/graph/VectorLogicalNode.h
/usr/include/JAGS/graph/VectorStochasticNode.h