{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
        let adt = def.ty(ctx.db()).strip_references().as_adt()?;
        let def = ctx.sema.to_def(self_param)?;
        let InFile { file_id: _, value } = adt.source(ctx.db())?;