GraphOps
addNode
delNode
getNode
lookupNode
modNode
size
union
addConflict
delConflict
addConflicts
addCoalesce
delCoalesce
addExclusion
addExclusions
addPreference
coalesceNodes
coalesceGraph
freezeNode
freezeOneInGraph
freezeAllInGraph
scanGraph
setColor
validateGraph
slurpNodeConflictCount