docs: def camel_to_snake(camel_str):
      '''
      Convert `camel_str` from camelCase to snake_case
      '''
      # Attribution: https://stackoverflow.com/a/1176023/633213
      s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', camel_str)
      return re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).lower()