convoluted way to find out how many different unit primitives
there are, since edu.iris.Fissures.UnitBase
provides no accessor method and to avoid hard coding the value.
MotionVectorAttrImpl.java
Created: Thu Dec 6 22:00:42 2001
The strange extends is to avoid diamond of death while still reusing this
class in LocalMotionVector.
UNKNOWN -
Static variable in class edu.iris.Fissures.model.UnitImpl
This is an even dumber unit, exists so that we can fudge places where a
unit is required, but the code can't create it, perhaps in loading from a
string.