Utility classes are not standard c++ but some programmers use it , so UML offers support for it.
It is a class with a set of functions which are static. It does not have constructors or destructors or attributes since it
does not hold any persistent data. Eg.
class TrigMathFunctions{
static float Cosine (float angle);
static float Sine (float angle);
static float Tangent (float angle);
};