code: def _remove_marker(expression, marker="+"):
      return (
          expression.replace(marker, "", 1)
          if expression.startswith(marker)
          else expression
      )
  
imports: import logging
  import re
  from collections import OrderedDict
  from scipy.stats import distributions
  from orion.algo.space import Categorical, Fidelity, Integer, Real, Space
  from orion.core.utils.flatten import flatten
label_desc: Use image node_id 6 for calling a global function with example usage: _remove_marker(expression, marker) and returns: unknown