Function rustfmt_nightly::items::rewrite_opaque_type

pub(crate) fn rewrite_opaque_type(
    context: &RewriteContext<'_>, 
    indent: Indent, 
    ident: Ident, 
    generic_bounds: &GenericBounds, 
    generics: &Generics, 
    vis: &Visibility, 
    span: Span
) -> Option<String>