class_docstr: Default filter. Subclass this class or use the `simplefilter`
  decorator to create own filters.
code: def __init__(self, **options):
      self.options = options
  
file_path: catboost/contrib/python/Pygments/py3/pygments/filter.py
label_desc: Use image node_id 1 to create a new Filter object  with example: obj = Filter()