code: def to_snake_case(s: str) -> str:
      """Takes a string and converts it to snake case format.
  
      :param s: The string to be converted.
      :type s: str
      :return: The string in snake case format.
      :rtype: str
      """
      return s.lower().replace(" ", "_")
  
file_path: quinn/quinn/transformations.py
imports: from __future__ import annotations
  import re
  from collections.abc import Callable
  from pyspark.sql import DataFrame, SparkSession
  from pyspark.sql import functions
  from pyspark.sql.types import ArrayType, MapType, StructField, StructType
  from quinn.schema_helpers import complex_fields
label_desc: Use image node_id 4 for calling a global function with example usage: to_snake_case(s) and returns: s