Complex class should be refactored

Reports the classes that are too complex.

Class complexity is evaluated based on three metrics:

• TCC (Tight class cohesion) — the measure of class cohesiveness (more is better).

• WMC (Weighted Method count) — the sum of cyclomatic complexities for all methods in a class (less is better).

• ATFD (Access to foreign data) — the number of properties from another class that are accessed in the current class (less is better).