Type Alias PathsPtr 

pub type PathsPtr<D> = for<'a> fn(Cv<'a, D, (<D as DataT>::V<'a>, List<<D as DataT>::V<'a>>)>) -> ValXs<'a, (<D as DataT>::V<'a>, List<<D as DataT>::V<'a>>), <D as DataT>::V<'a>>;

Paths function pointer (see Id::paths).