class_docstr: Helper functions for testing.
  
  Primarily provided for tests that use fixture (and derived)
  `three_experiments_branch_same_name_trials_benchmarks`
class_docstr_tok: ["Helper","functions","for","testing",".","Primarily","provided","for","tests","that","use","fixture","(","and","derived",")","`","three_experiments_branch_same_name_trials_benchmarks","`"]
docstr: Check that given database is empty
code: def check_empty_db(loaded_db):
      """Check that given database is empty"""
      _Helpers.check_db(
          loaded_db, nb_exps=0, nb_algos=0, nb_trials=0, nb_benchmarks=0
      )
  
imports: import copy
  import os
  import pickle
  import zlib
  from collections import Counter
  from tempfile import NamedTemporaryFile
  import pytest
  import yaml
  import orion.core.cli
  import orion.core.io.experiment_builder
  import orion.core.utils.backward
  from orion.core.worker.trial import Trial
  from orion.storage.backup import _get_exp_key, dump_database, get_experiment_parent_links, get_experiment_root_links, get_trial_parent_links
label_desc: Use image node_id 3 for calling the _Helpers obj's underlying member method code with example usage: obj.check_empty_db(loaded_db) without return types