{"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"UninhabitedEnumVariantRead(Option<VariantIdx>),"}]}
    UninhabitedEnumVariantRead(Option<VariantIdx>),
    /// An uninhabited enum variant is projected.
    /// Trying to set discriminant to the niched variant, but the value does not match.