Function rustfmt_nightly::items::rewrite_associated_impl_type

pub(crate) fn rewrite_associated_impl_type(
    ident: Ident, 
    vis: &Visibility, 
    defaultness: Defaultness, 
    ty_opt: Option<&P<Ty>>, 
    generics: &Generics, 
    context: &RewriteContext<'_>, 
    indent: Indent, 
    span: Span
) -> Option<String>