protected UdpTransportMapping getTransportMapping() {
    return transportMapping;
  }
Returns {@link TrapSecurity} instance corresponding to dispatch property <code>ambari.dispatch.snmp.security.level</code> from dispatch properties.
@param dispatchProperties dispatch properties
@return corresponding TrapSecurity instance
@throws InvalidSnmpConfigurationException if dispatch properties doesn't contain required property
ambari-server/src/main/java/org/apache/ambari/server/notifications/dispatchers/SNMPDispatcher.java