# File lib/sqs/right_sqs_interface.rb, line 220
    def set_visibility_timeout(queue_url, visibility_timeout=nil)
      req_hash = generate_request('SetVisibilityTimeout', 
                                  'VisibilityTimeout' => visibility_timeout || DEFAULT_VISIBILITY_TIMEOUT,
                                  :queue_url => queue_url )
      request_info(req_hash, SqsStatusParser.new(:logger => @logger))
    rescue
      on_exception
    end