code: def certificate_validation(value=None):
          
          if value is None:
              return PyGraphistry._config['certificate_validation']
  
          # setter
          v = bool(strtobool(value)) if isinstance(value, basestring) else value
          if v == False:
              requests.packages.urllib3.disable_warnings()
          PyGraphistry._config['certificate_validation'] = v
docs: Enable/Disable SSL certificate validation (True, False).
          Also set via environment variable GRAPHISTRY_CERTIFICATE_VALIDATION.