How to use the long.ONE function in long

function decodeZigZag64(n) {
    //     (n >>> 1) ^ -(n & 1);
    return n.shiftRightUnsigned(1).xor(n.and(Long.ONE).negate());
  }

ByteBuffer.zigZagDecode64 = function(value) {
            if (typeof value === 'number')
                value = Long.fromNumber(value, false);
            else if (value.unsigned !== false) value = value.toSigned();
            // ref: src/google/protobuf/wire_format_lite.h
            return value.shiftRightUnsigned(1).xor(value.and(Long.ONE).toSigned().negate()).toSigned();
        };

function computeUnsignedVIntSize(value) {
    const magnitude = numberOfLeadingZeros(value.or(Long.ONE));
    return (639 - magnitude * 9) >> 6;
  }

Builder.prototype.addNanos = function(nanos) {
  const value = typeof nanos === 'string' ? Long.fromString(nanos) : nanos;
  this._validateOrder(10);
  this._validateNanos(value, Long.ONE);
  this._nanoseconds = this._nanoseconds.add(value);
  return this;
};

}
  if (this.months < 0 || this.days < 0 || this.nanoseconds.isNegative()) {
    value = '-';
  }
  let remainder = append(Math.abs(this.months), monthsPerYear, "y");
  append(remainder, 1, "mo");
  append(Math.abs(this.days), 1, "d");

  if (!this.nanoseconds.equals(Long.ZERO)) {
    const nanos = this.nanoseconds.isNegative() ? this.nanoseconds.negate() : this.nanoseconds;
    remainder = append64(nanos, nanosPerHour, "h");
    remainder = append64(remainder, nanosPerMinute, "m");
    remainder = append64(remainder, nanosPerSecond, "s");
    remainder = append64(remainder, nanosPerMilli, "ms");
    remainder = append64(remainder, nanosPerMicro, "us");
    append64(remainder, Long.ONE, "ns");
  }
  return value;
};