Function3<A, B, C, R>  typedef 
 
        Function3<A, B, C, R> =
     R Function(A a, B b, C c)
     
    
    
Implementation
typedef Function3<A, B, C, R> = R Function(A a, B b, C c);typedef Function3<A, B, C, R> = R Function(A a, B b, C c);