title: WebParam.Mode.OUT meaning and documentation
body: <p>I usually create stub to interrogate external web service, It is the first time that after I created the stub of a project, in the Service.class I have this code:</p>
  
  <pre><code>public void getInformation(
      @WebParam(name = "username", targetNamespace = "http://mysite")
      java.lang.String username,
      @WebParam(name = "password", targetNamespace = "http://mysite")
      java.lang.String password,
      @WebParam(mode = WebParam.Mode.OUT, name = "GetInformation", targetNamespace = "http://mysite")
      javax.xml.ws.Holder&lt;MyInformation&gt; getInformation,
      @WebParam(mode = WebParam.Mode.OUT, name = "outPut", targetNamespace = "http://mysite")
      javax.xml.ws.Holder&lt;MyFile&gt; fOutPut
  );
  </code></pre>
  
  <p>In the documentation of this web method there is written that the input parameter is username and password, and the output parameter is Holder getInformation,Holder fOutPut; but when I try to call the method, I have to insert all the paramenter in input, like
   myClientClass.getInformation(username,password,getInformation,fOutPut);</p>
  
  <p>I try to search online a documentation but I have not found anything, I have understand that It is a way to populate my output value without have It in return, but I want to understand how It really works and If there is any documentation/example to implement a web method like this or how to send value in this way. 
  Thank you</p>