isEmpty () {
    return (
      (this._codePoints !== null && this._codePoints.length === 0) ||
      (this._string !== null && this._string === '') ||
      (this._bytes !== null && this._bytes.length === 0)
    )
  }
/**
   * Returns true if Chain contains no string
   * characters, Unicode code points or bytes.
   * @return {boolean}
   */
Returns true if Chain contains no string
characters, Unicode code points or bytes.
@return {boolean}
Returns true if Chain contains no string characters Unicode code points or bytes . @return { boolean }
isEmpty () {
    return (
      (this._codePoints !== null && this._codePoints.length === 0) ||
      (this._string !== null && this._string === '') ||
      (this._bytes !== null && this._bytes.length === 0)
    )
  }
isEmpty ( ) { return ( ( this . _codePoints !== null && this . _codePoints . length === 0 ) || ( this . _string !== null && this . _string === '' ) || ( this . _bytes !== null && this . _bytes . length === 0 ) ) }
Returns true if Chain contains no string
 characters, Unicode code points or bytes.
Returns true if Chain contains no string characters Unicode code points or bytes .