code: public static String postLaunchHTML(final Properties cleanProperties,
              String endpoint, boolean debug) {
          Map<String, String> map = convertToMap(cleanProperties);
          return postLaunchHTML(map, endpoint, debug);
      }
docs: Create the HTML to render a POST form and then automatically submit it.
  Make sure to call {@link #cleanupProperties(Properties)} before signing.
  
  @deprecated Moved to {@link #postLaunchHTML(Map, String, boolean)}
  @param cleanProperties Assumes you have called
  {@link #cleanupProperties(Properties)} beforehand.
  @param endpoint The LTI launch url.
  @param debug Useful for viewing the HTML before posting to end point.
  @return the HTML ready for IFRAME src = inclusion.