code: public void removeTangoInterfaceChangeListener(ITangoInterfaceChangeListener listener, String deviceName)
              throws DevFailed {
          synchronized (moni) {
              TangoInterfaceChange interfaceChange_change;
              if ((interfaceChange_change = tango_interface_change_source.get(deviceName)) != null)
                  interfaceChange_change.removeTangoInterfaceChangeListener(listener);
          }
      }
docs: =======================================================================