class_docstr: Factory methods for common type conversion functions for `Param.typeConverter`.
  
  .. versionadded:: 2.0.0
docstr: Convert a value to a string, if possible.
docstr_tok: ["Convert","a","value","to","a","string",",","if","possible","."]
code: def toString(value: Any) -> str:
      """
      Convert a value to a string, if possible.
      """
      if isinstance(value, str):
          return value
      elif type(value) in [np.string_, np.str_, np.unicode_]:
          return str(value)
      else:
          raise TypeError(
              "Could not convert %s to string type" % type(value)
          )
  
imports: import array
  from abc import ABCMeta
  import copy
  from typing import Any, Callable, Generic, List, Optional, overload, TypeVar, Union, TYPE_CHECKING
  import numpy
  from py4j.java_gateway import JavaObject
  from pyspark.ml.linalg import DenseVector, Vector, Matrix
  from pyspark.ml.util import Identifiable
label_desc: Use image node_id 15 for calling the TypeConverters obj's underlying member method code with example usage: obj.toString(value) and returns: value, str