Returns the number of specialization group (dual specs) the player has.
numSpecGroups = GetNumSpecGroups([b])
- boolean - In theory this returns information for the inspected target instead of the player. In practice, this seems to return 0 if true. Defaults to false.
- number - number of available specialization groups; 1 for characters that have not learned dual-specializations, 2 for those that have.