class Svc  :2-21
  fun nestedDefault(a, b) → Int  :3-3
  fun closureParam(cb, n) → Int  :6-6
  fun deepGenerics(m) → Int  :9-9
  fun stringDelims(sep, other) → String  :12-12
  fun trailingComma(a, b) → Int  :15-18
class Dto  :24-24
class Consumer  :26-30
  fun consume(n) → String  :27-27
