if (willAddHeaders(message)) { messageHeaders = new HashMap<>(messageHeaders); addHeaders(message, messageHeaders);
if (willAddHeaders(message)) { messageHeaders = new HashMap<>(messageHeaders); addHeaders(message, messageHeaders);
if (willAddHeaders(message)) { messageHeaders = new HashMap<>(messageHeaders); addHeaders(message, messageHeaders);
if (willAddHeaders(message)) { messageHeaders = new HashMap<>(messageHeaders); addHeaders(message, messageHeaders);