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                This node is for Depth Of Field (DOF) postprocess.
                Note, its not a true dependency node, it has attributes
                but no computePlug. DOF can be evaluated by
                calling computeDOF.  Don't bother trying to hook
                this up in a network, it only makes sense when it is
                connected to the postProcesses node.

Node nameParentsClassificationMFn typeCompatible function sets
dofdependNodepostprocesskDOFkBase
kNamedObject
kDependencyNode
kDOF