code: function Bloom(size, n, tweak, update) {
    if (!(this instanceof Bloom))
      return new Bloom(size, n, tweak, update);
  
    this.filter = DUMMY;
    this.size = 0;
    this.n = 0;
    this.tweak = 0;
    this.update = Bloom.flags.NONE;
  
    if (size != null)
      this.fromOptions(size, n, tweak, update);
  }
docs: Bloom Filter
  @alias module:utils.Bloom
  @constructor
  @param {Number} size - Filter size in bits.
  @param {Number} n - Number of hash functions.
  @param {Number} tweak - Seed value.
  @param {Number|String} - Update type.
  @property {Buffer} filter
  @property {Number} size
  @property {Number} n
  @property {Number} tweak
  @property {Number} update - Update flag (see {@link Bloom.flags}).