{"ast_node_type":"import","tokens":[{"end":80,"kind":"keyword","start":0,"text":"///"}]}
    /// `non_exhaustive` is false, don't use this; use `NoConstructors` instead.
    /// This type has the following list of constructors. If `variants` is empty and
    Variants { variants: IndexVec<Cx::VariantIdx, VariantVisibility>, non_exhaustive: bool },