code: @Override
      public void init() throws ServletException {
          super.init();
  
          // GET
          operations.setOperation(ServletOperationSet.Method.GET, Extension.json,
                  Operation.get, new GetOperation());
          operations.setOperation(ServletOperationSet.Method.GET, Extension.json,
                  Operation.map, new MapGetOperation());
          operations.setOperation(ServletOperationSet.Method.GET, Extension.bin,
                  Operation.get, new GetBinaryOperation());
  
          // POST
          operations.setOperation(ServletOperationSet.Method.POST, Extension.bin,
                  Operation.put, new PostBinaryOperation());
  
          // PUT
          operations.setOperation(ServletOperationSet.Method.PUT, Extension.json,
                  Operation.put, new PutOperation());
          operations.setOperation(ServletOperationSet.Method.PUT, Extension.json,
                  Operation.copy, new CopyOperation());
          operations.setOperation(ServletOperationSet.Method.PUT, Extension.bin,
                  Operation.put, new PutBinaryOperation());
          operations.setOperation(ServletOperationSet.Method.PUT, Extension.bin,
                  Operation.update, new PutUpdateOperation());
  
          // DELETE
          operations.setOperation(ServletOperationSet.Method.DELETE, Extension.json,
                  Operation.remove, new RemoveOperation());
      }
docs: setup of the servlet operation set for this servlet instance