public static String append(final CharSequence url, final Object... params) {
    final String baseUrl = url.toString();
    if (params == null || params.length == 0)
      return baseUrl;

    if (params.length % 2 != 0)
      throw new IllegalArgumentException(
          "Must specify an even number of parameter names/values");

    final StringBuilder result = new StringBuilder(baseUrl);

    addPathSeparator(baseUrl, result);
    addParamPrefix(baseUrl, result);

    addParam(params[0], params[1], result);

    for (int i = 2; i < params.length; i += 2) {
      result.append('&');
      addParam(params[i], params[i + 1], result);
    }

    return result.toString();
  }
Append given name/value pairs as query parameters to the base URL
<p>
The params argument is interpreted as a sequence of name/value pairs so the
given number of params must be divisible by 2.

@param url
@param params
         name/value pairs
@return URL with appended query params
lib/src/main/java/com/github/kevinsawicki/http/HttpRequest.java