*** METRICS ***
--- Detection of variance constraints on formal parameter types ---
-- Generic classes --
 list:
  with 1 formal type parameter: 13 (92.85%)
  non generic: 1 (7.14%)
  total classes: 14
  total formal parameters: 13
-- Including `private` properties --
  covariants: 2 (15.38%)
  contravariants: 2 (15.38%)
  bivariants: 7 (53.84%)
  invariants: 2 (15.38%)
  total: 13
-- Excluding `private` properties --
  covariants: 2 (15.38%)
  contravariants: 2 (15.38%)
  bivariants: 7 (53.84%)
  invariants: 2 (15.38%)
  total: 13