#svSelectionSetChanged: integerSent when the Schematic View selection set has changed. callbacks.notificationParam() returns the Schematic View index.
#svDoubleClickGraphNode: undefinedSent when the user double-clicked a Schematic View node.
#svPreLayoutChange: integerSent before Schematic View applies its layout algorithm.
Calling callbacks.notificationParam() within the callback function returns the Schematic View index.
#svPostLayoutChange: integerSent after Schematic View applies its layout algorithm.
Calling callbacks.notificationParam() within the callback function returns the Schematic View index.