Function21<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21>

typedef Function21<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21> = T21 Function(
  T0,
  T1,
  T2,
  T3,
  T4,
  T5,
  T6,
  T7,
  T8,
  T9,
  T10,
  T11,
  T12,
  T13,
  T14,
  T15,
  T16,
  T17,
  T18,
  T19,
  T20,
)

Type alias for function taking 21 arguments.