docs: def InitFromAff4Object(self, aff4_obj):
      """Initializes the current instance from an Aff4Object.
  
      Iterates the inheritance hierarchy of the given Aff4Object and adds a
      ApiAff4ObjectType for each class found in the hierarchy.
  
      Args:
        aff4_obj: An Aff4Object as source for the initialization.
  
      Returns:
        A reference to the current instance.
      """
      attr_blacklist = []  # We use this to show attributes only once.
  
      self.types = []
      for aff4_cls in aff4_obj.__class__.__mro__:
        if not hasattr(aff4_cls, "SchemaCls"):
          continue
  
        type_repr = ApiAff4ObjectType().InitFromAff4Object(
            aff4_obj, aff4_cls, attr_blacklist)
  
        if type_repr.attributes:
          self.types.append(type_repr)
  
        # Add all attribute names from this type representation to the
        # blacklist to not add them to the result again.
        attr_blacklist.extend([attr.name for attr in type_repr.attributes])
  
      return self