SoTransformManip(3) on Linux
The text 355e55b984d7, as Debian 6.0 (Squeeze) shipped it.
The SoTransformManip class is used to manipulate transformations. A manipulator is used by replacing the node you want to edit in the graph with the manipulator. Draggers are used to to manipulate the node. When manipulation is finished, the node is put back into the graph, replacing the manipulator.