SOURCE

let objects = [
  { x: 1, y: 2, z: 1 },
  { x: 2, y: 1, z: 2 },
  { x: 1, y: 2, z: 3 },
];

function uniqFn(array, keysList) {
  return _.uniqWith(array, function (arrVal, othVal) {
    return keysList.reduce((acc, cur, idx) => {
      return acc && arrVal[cur] === othVal[cur];
    }, true);
  });
}

console.log(uniqFn(objects, ["x", "y"]))