code: function TruncateFactor(variable, V, W, epsilon) {
        TruncateFactor.__super__.constructor.call(this, [variable]);
        this["var"] = variable;
        this.V = V;
        this.W = W;
        this.epsilon = epsilon;
      }
docs: /* A factor for (approximately) truncating the team difference
  distribution based on a win or a draw (the choice of which is
  determined by the functions you pass as V and W).