code: public static Properties signProperties(Properties postProp, String url,
              String method, String oauth_consumer_key, String oauth_consumer_secret,
              String org_id, String org_desc, String org_url) {
          final Map<String, String> signedMap = signProperties(
                  convertToMap(postProp), url, method, oauth_consumer_key,
                  oauth_consumer_secret, org_id, org_desc, org_url, null, null);
          return convertToProperties(signedMap);
      }
docs: Add the necessary fields and sign.
  
  @deprecated See:
  {@link BasicLTIUtil#signProperties(Map, String, String, String, String, String, String, String, String, String)}
  
  @param postProp
  @param url
  @param method
  @param oauth_consumer_key
  @param oauth_consumer_secret
  @param org_id See: {@link BasicLTIConstants#TOOL_CONSUMER_INSTANCE_GUID}
  @param org_desc See:
  {@link BasicLTIConstants#TOOL_CONSUMER_INSTANCE_DESCRIPTION}
  @param org_url See: {@link BasicLTIConstants#TOOL_CONSUMER_INSTANCE_URL}
  @return