class_docstr: Interface for collecting information and visualizations for a feature.
  
  A "widget" serves as a container for data, diagnostics, and other outputs
  (i.e. DataFrames, plots, estimators etc.) for a feature in data-describe.
code: def __str__(self):
      return "data-describe Base Widget"
  
imports: from abc import ABC, abstractmethod
label_desc: Use image node_id 2 for calling the BaseWidget obj's underlying member method code with example usage: obj.__str__() and returns: str