code: function fromUInt64 (buf) {
    var high = buf.readUInt32BE(0) | 0 // force
    var low = buf.readUInt32BE(4) | 0
    var lowUnsigned = (low >= 0) ? low : TWO_PWR_32 + low
  
    return (high * TWO_PWR_32) + lowUnsigned
  }
docs: Return the closest floating-point representation to the buffer value. Precision will be
  lost for big numbers.