# Associated type bound

fn f<T: Iterator<Item: Send>>() {}

==>

SourceFile(
  FunctionItem(
    fn,
    BoundIdentifier,
    TypeParamList(
      ConstrainedTypeParameter(
        TypeIdentifier,
        TraitBounds(
          GenericType(
            TypeIdentifier,
            TypeArgList(
              TypeBinding(TypeIdentifier, TraitBounds(TypeIdentifier))))))),
    ParamList,
    Block))


# Generic associated type bound

fn f<T: Trait<Item<u8>: Copy>>() {}

==>

SourceFile(
  FunctionItem(
    fn,
    BoundIdentifier,
    TypeParamList(
      ConstrainedTypeParameter(
        TypeIdentifier,
        TraitBounds(
          GenericType(
            TypeIdentifier,
            TypeArgList(
              TypeBinding(
                GenericType(TypeIdentifier, TypeArgList(TypeIdentifier)),
                TraitBounds(TypeIdentifier))))))),
    ParamList,
    Block))