Func3<T, A, B, C>  typedef 
 
        Func3<T, A, B, C> =
     T Function([A a, B b, C c])
     
    
    
Implementation
typedef Func3<T, A, B, C> = T Function([A a, B b, C c]);typedef Func3<T, A, B, C> = T Function([A a, B b, C c]);