code: @DELETE
      @Path("/channels/{ccid}")
      public Response migrateChannel(@PathParam("ccid") String ccid) {
          return Response.status(501 /* Not Implemented */).build();
      }
docs: TODO placeholder for future implementation
  
  Migrates a single channel to a different bounce proxy.
  @param ccid cluster controller id
  @return response with status 501 (not implemented)