get the protocol value . concode_field_sep String profileMonitorStatus concode_elem_sep String path concode_elem_sep String protocol concode_elem_sep Long port concode_field_sep String profileMonitorStatus concode_elem_sep MonitorConfig withPath concode_elem_sep String path concode_elem_sep MonitorConfig withProtocol concode_elem_sep Long port concode_elem_sep MonitorConfig withPort concode_elem_sep MonitorConfig withProfileMonitorStatus
String function ( ) { return this . protocol ; }