How to use the @glennsl/bs-json/src/Json_encode.bs.js.object_ function in @glennsl/bs-json

function encode(filter) {
  var query;
  if (filter) {
    var text = filter[0];
    if (isSymbol(text)) {
      console.log("is symbol");
      query = Json_encode.object_(/* :: */[
            /* tuple */[
              "symbol",
              text
            ],
            /* [] */0
          ]);
    } else {
      query = Json_encode.object_(/* :: */[
            /* tuple */[
              "title",
              text
            ],
            /* :: */[
              /* tuple */[
                "subtitle",
                text