FutureOrValue3Callback<A, B, C>  typedef 
 
        FutureOrValue3Callback<A, B, C> =
     FutureOr<void>  Function(A value1, B value2, C value3)
     
    
    
Implementation
typedef FutureOrValue3Callback<A, B, C> = FutureOr<void> Function(
  A value1,
  B value2,
  C value3,
);