AI Intercept Algorithm

I was looking into the AIGama stuff in the wiki:

and decided to have a play around with the Intercept test, and after copy all the files from the wiki and attempting to run the test, it  failed because of a missing class "MathClass" on the line in

float tc = MathClass.magnitude(sr) / MathClass.magnitude(vr);

Does anybody know what the magnitude function returns for a vector3f?

its length.

Yea, if i looked a bit further down I would have seen that in the tutorial! Still strange class reference given length exists in FastMath.