title: GWT: conflicting classes in the gwt-user.jar
body: <p>This sounds like a stupid question, but I cannot find the answer.</p>
  
  <p>I'm using GWT and I need to use JSON on the client. Corresponding classes are in package <em>com.google.gwt.json.client</em> and are located in <em>gwt-user.jar</em>. However, the same JAR contains <em>javax.servlet</em> classes that conflict (different version) with the ones I use in servlet container. How do I resolve this problem? </p>