docs: def register(self, obj=None, memo=None):
          """
          Creates a :class:`Blueprint.cls` and calls each deferred operation.
  
          :param obj:
              The initialized object with which to call all deferred operations.
          :type obj: object
  
          :param memo:
              A dictionary to cache registered Blueprints.
          :type memo: dict[Blueprint,T]
  
          :return:
              The initialized object.
          :rtype: Blueprint.cls | Blueprint
  
          **--------------------------------------------------------------------**
  
          Example::
  
              >>> import schedula as sh
              >>> blue = sh.BlueDispatcher().add_func(len, ['lenght'])
              >>> blue.register()
              <schedula.dispatcher.Dispatcher object at ...>
          """
          if memo and self in memo:
              obj = memo[self]
              if obj is not None:
                  return obj
          if obj is None:
              obj = _safe_call(self.cls, *self.args, memo=memo, **self.kwargs)
  
          for method, kwargs in self.deferred:
              _safe_call(getattr(obj, method), memo=memo, **kwargs)
  
          if memo is not None:
              memo[self] = obj
  
          return obj