{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"MetaVarExpr::Count(original_ident,"}]}
        MetaVarExpr::Count(original_ident, depth) => {
        MetaVarExpr::Concat(ref elements) => metavar_expr_concat(tscx, dspan, elements)?,
            let matched = matched_from_ident(dcx, original_ident, tscx.interp)?;