docs: function _gpfToBaseANY (base, value, formattingOptions) {
      var length = formattingOptions.length,
          paddingLength = length || 1,
          paddingChars = formattingOptions.pad || base.charAt(0);
      return _gpfToBaseAnyPad(_gpfToBaseAnyEncode({
          base: base,
          value: value
      }, length), paddingLength, paddingChars).join("");
  }