message: make to_kind_type public
diff: @@ -202,7 +202,7 @@ impl Address {
  }
  /// Return the Kind type of a given address
  - fn to_kind_type(&self) -> KindType {
  + pub fn to_kind_type(&self) -> KindType {
  match self.1 {
  Kind::Single(_) => KindType::Single,
  Kind::Group(_, _) => KindType::Group,
  