class_docstr: Abstract class for components that could be fitted on the data as a whole.
code: def fit(self, *args, **kwargs):
      pass
  
imports: from abc import abstractmethod
  from .component import Component
  from .serializable import Serializable
label_desc: Use image node_id 1 for calling the Estimator obj's underlying member method code with example usage: obj.fit() without return types