code: def get_feature_contributions_sign_to_show(
      positive: list, negative: list
  ) -> Optional[bool]:
      """Get the feature contributions sign to show on plot.
  
      Parameters
      ----------
      positive : list
          Click on positive contributions
      negative : list
          Click on negative contributions
  
      Returns
      -------
      Optional[bool]
          Sign to show on plot
      """
      if positive == [1]:
          sign = None if negative == [1] else True
      else:
          sign = False if negative == [1] else None
      return sign
  
imports: from typing import Optional, Tuple
  import numpy
  import pandas
  import datetime
  from dash import dcc, html
  import dash_bootstrap_components
label_desc: Use image node_id 12 for calling a global function with example usage: get_feature_contributions_sign_to_show(positive, negative) and returns: sign