Predicate9<T1, T2, T3, T4, T5, T6, T7, T8, T9>  typedef 
 
Predicate function type with 9 positional arguments.
Implementation
typedef Predicate9<T1, T2, T3, T4, T5, T6, T7, T8, T9> =
    Map9<T1, T2, T3, T4, T5, T6, T7, T8, T9, bool>;