docs: public static SpecificErrorCondition getSpecificErrorCondition(StanzaError error) {
          // This method is implemented to provide an easy way of getting a packet
          // extension of the XMPPError.
          for (SpecificErrorCondition condition : SpecificErrorCondition.values()) {
              if (error.getExtension(condition.toString(),
                      AdHocCommandData.SpecificError.namespace) != null) {
                  return condition;
              }
          }
          return null;
      }