code: function num2hex(value, options) {
    if (value === undefined) throw new Error('Value is undefined');
  
    var buffer = Buffer.alloc(NUMBER_OF_BYTES);
  
    writeTobuffer(value, buffer);
  
    return buf2hex(buffer, options);
  }
docs: Converts an IEEE 754 number into a hex representation of it.
  @param {number} value - Number to be converted into an hexadecimal string.
  @param {object} options - Options configuration object.
  @return {string} IEEE 754 hex representation of the number.