code: public static void addActionOutput( String name, Object value, ServletRequest request )
      {
          Map map = InternalUtils.getActionOutputMap( request, true );
          
          if ( map.containsKey( name ) )
          {
              if ( _log.isWarnEnabled() )
              {
                  _log.warn( "Overwriting action output\"" + name + "\"." );
              }
          }
          
          map.put( name, value );
      }
docs: Set a named action output, which corresponds to an input declared by the <code>pageInput</code> JSP tag.
  The actual value can be read from within a JSP using the <code>"pageInput"</code> databinding context.
  
  @param name the name of the action output.
  @param value the value of the action output.
  @param request the current ServletRequest.