code: def clear(self):
      if self.tracker:
          for value in self:
              self.tracker.untrack(value)
      super().clear()
  
imports: from functools import wraps
  from keras.backend.common.global_state import get_global_attribute
  from keras.backend.common.global_state import set_global_attribute
  from keras.utils import python_utils
label_desc: Use image node_id 7 for calling the TrackedList obj's underlying member method code with example usage: obj.clear() without return types