code: public static DeviceProxy get(String deviceName, String tangoHost) throws DevFailed {
          //	Get full device name (with tango host) to manage multi tango_host
          String fullDeviceName;
          if (deviceName.startsWith("tango://") || deviceName.startsWith("//"))
              fullDeviceName = deviceName;
          else
              fullDeviceName = "tango://"+tangoHost + "/"+deviceName;
  
          //	Get it if already exists
          DeviceProxy dev =  proxy_table.get(fullDeviceName);
          if (dev == null) {
              try {
                  //	Else create it.
                  dev = new DeviceProxy(deviceName);
                  proxy_table.put(fullDeviceName, dev);
              }
              catch(DevFailed e) {
                  e.printStackTrace();
                  throw e;
              }
          }
          return dev;
      }
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