code: public static HttpRequest head(final CharSequence baseUrl,
        final Map<?, ?> params, final boolean encode) {
      String url = append(baseUrl, params);
      return head(encode ? encode(url) : url);
    }
docs: Start a 'HEAD' request to the given URL along with the query params
  
  @param baseUrl
  @param params
  The query parameters to include as part of the baseUrl
  @param encode
  true to encode the full URL
  
  @see #append(CharSequence, Map)
  @see #encode(CharSequence)
  
  @return request