question: get last speed readings . concode_field_sep String SPEED_PREFIX concode_elem_sep MqttClient mqttClient concode_elem_sep ConcurrentHashMap<String,String> latestAccelerationReadings concode_elem_sep String TEMPERATURE_PREFIX concode_elem_sep String ACCELERATION_PREFIX concode_elem_sep ConcurrentHashMap<String,String> latestTemperatureReadings concode_elem_sep ConcurrentHashMap<String,String> latestSpeedReadings concode_elem_sep Log log concode_field_sep void connectionLost concode_elem_sep void disconnect concode_elem_sep void messageArrived concode_elem_sep void subscribe concode_elem_sep void unsubscribe concode_elem_sep void sendMessage concode_elem_sep void deliveryComplete concode_elem_sep ConcurrentHashMap<String,String> getLatestTemperatureReadings concode_elem_sep ConcurrentHashMap<String,String> getLatestAccelerationReadings
target: ConcurrentHashMap < String , String > function ( ) { return latestSpeedReadings ; }