{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
    let ty2_with_vars = table.resolve_completely(ty2_with_vars);
    let ty1_with_vars = table.resolve_completely(ty1_with_vars);
    table.unify_deeply(&ty1_with_vars, &ty2_with_vars)