How to implement the 'contain' spatial join in Google Earth Engine?

I find a solution: ee.Filter.contains() or ee.Filter.isContained().

var polys = 
    /* color: #0b4a8b */
    /* displayProperties: [
      {
        "type": "rectangle"
      },
      {
        "type": "rectangle"
      },
      {
        "type": "rectangle"
      }
    ] */
    ee.FeatureCollection(
        [ee.Feature(
            ee.Geometry.Polygon(
                [[[-110.20732421875, 44.02023306138536],
                  [-110.20732421875, 43.464640103242],
                  [-109.3943359375, 43.464640103242],
                  [-109.3943359375, 44.02023306138536]]], null, false),
            {
              "landcover": 0,
              "system:index": "0"
            }),
        ee.Feature(
            ee.Geometry.Polygon(
                [[[-108.84501953125, 43.480585732644144],
                  [-108.84501953125, 42.88779655005588],
                  [-107.944140625, 42.88779655005588],
                  [-107.944140625, 43.480585732644144]]], null, false),
            {
              "landcover": 0,
              "system:index": "1"
            }),
        ee.Feature(
            ee.Geometry.Polygon(
                [[[-107.6365234375, 44.555012919342055],
                  [-107.6365234375, 43.941178353199525],
                  [-106.91142578125, 43.941178353199525],
                  [-106.91142578125, 44.555012919342055]]], null, false),
            {
              "landcover": 0,
              "system:index": "2"
            })]),
    givenGeometry= 
    /* color: #ffc82d */
    /* displayProperties: [
      {
        "type": "rectangle"
      }
    ] */
    ee.Feature(
        ee.Geometry.Polygon(
            [[[-110.55888671875, 45.22437812507874],
              [-110.55888671875, 42.32175585200791],
              [-107.30693359375, 42.32175585200791],
              [-107.30693359375, 45.22437812507874]]], null, false),
        {
          "id": 0,
          "system:index": "0"
        });

var containsFilter = ee.Filter.contains({
  leftField: '.geo',
  rightField: '.geo',
  maxError: 1
});

// Define a saveAll join.
var distSaveAll = ee.Join.saveAll({
  matchesKey: 'polygons',
});

// Apply the join.
var spatialJoined = distSaveAll.apply(givenGeometry, polys, containsFilter);
var listOfElements = spatialJoined.first().get('polygons')
var result = ee.FeatureCollection(listOfElements.getInfo());
print('result', result);