code: def add_indicator(self, indicator: Indicator):
      self.dot_indicators[indicator.name] = indicator
      self.is_indicators_updated = True
  
imports: from pathlib import PurePath
  from typing import Dict, List, Optional, Callable, Union, Tuple
  from labml import logger
  from .indicators import Indicator
  from .indicators.factory import load_indicator_from_dict, create_default_indicator
  from .indicators.numeric import Scalar
  from .namespace import Namespace
  from .writers import Writer
  from .writers.screen import ScreenWriter
  from ..None import util
  from ..lab import lab_singleton, LabYamlNotfoundError
  from ..logger import LogPart
  from ..util import strings
  from ..util.colors import StyleCode
label_desc: Use image node_id 11 for calling the Tracker obj's underlying member method code with example usage: obj.add_indicator(indicator) without return types