class_docstr: Logical object for tracking Hyperband bracket progress. Keeps track
  of proper parameters as designated by HyperBand.
  
  Also keeps track of progress to ensure good scheduling.
class_docstr_tok: ["Logical","object","for","tracking","Hyperband","bracket","progress",".","Keeps","track","of","proper","parameters","as","designated","by","HyperBand",".","Also","keeps","track","of","progress","to","ensure","good","scheduling","."]
docstr: Checks if bracket is filled.
  
  Only let new trials be added at current level minimizing the need
  to backtrack and bookkeep previous medians.
docstr_tok: ["Checks","if","bracket","is","filled",".","Only","let","new","trials","be","added","at","current","level","minimizing","the","need","to","backtrack","and","bookkeep","previous","medians","."]
code: def filled(self) -> bool:
      """Checks if bracket is filled.
  
      Only let new trials be added at current level minimizing the need
      to backtrack and bookkeep previous medians."""
  
      return len(self._live_trials) == self._n
  
imports: import collections
  from typing import Dict, List, Optional, Tuple, TYPE_CHECKING
  import numpy
  import logging
  from ray.util.annotations import PublicAPI
  from ray.tune.result import DEFAULT_METRIC
  from ray.tune.schedulers.trial_scheduler import FIFOScheduler, TrialScheduler
  from ray.tune.experiment import Trial
  from ray.tune.error import TuneError
label_desc: Use image node_id 7 for calling the _Bracket obj's underlying member method code with example usage: obj.filled() and returns: unknown