utility method to handle logging . if ` quietmode ' is set , this method does nothing concode_field_sep String brokerUrl concode_elem_sep MqttClient client concode_elem_sep boolean quietMode concode_field_sep void connectionLost concode_elem_sep void printHelp concode_elem_sep void messageArrived concode_elem_sep void subscribe concode_elem_sep void publish concode_elem_sep void main concode_elem_sep void deliveryComplete
void function ( String arg0 ) { if ( ! quietMode ) { System . out . println ( arg0 ) ; } }