SectionP typedef

SectionP = bool Function(dynamic b)

A more or less direct implementation of Huet's paper Some inspiration from Clojure's zippers in an attemp to make it generic The Dart type system definitely leaves room for desire A predicate to determine if the current node is an Item or a Section

Implementation

/// A predicate to determine if the current node is an `Item` or a `Section`
typedef SectionP = bool Function(dynamic b);