{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"VariableKind::Lifetime"}]}
                VariableKind::Lifetime => ctx.new_lifetime_var().cast(Interner),
                // for now.
                VariableKind::Const(ty) => ctx.new_const_var(ty.clone()).cast(Interner),