code: public String getLocalParameter( String paramName )
      {
          if ( _additionalParameters != null )
          {
              String overrideParam = ( String ) _additionalParameters.get( paramName );
  
              if ( overrideParam != null )
              {
                  return overrideParam;
              }
          }
  
          ServletRequest request = getRequest();
          String retVal = request.getParameter( _scopedContainer.getScopedName( paramName ) );
  
          if ( retVal == null && _isActiveRequest && paramName.startsWith( AUTOSCOPE_PREFIX ) )
          {
              retVal = request.getParameter( paramName );
          }
          
          return retVal;
      }
docs: Get the parameter from the scoped request only (don't check in listen scoped requests)
  @param paramName
  @return value of the parameter