class_docstr: TextSet wraps a set of texts with status.
class_docstr_tok: ["TextSet","wraps","a","set","of","texts","with","status","."]
docstr: Do normalization on tokens.
  Need to tokenize first.
  See Normalizer for more details.
  
  :return: TextSet after normalization.
docstr_tok: ["Do","normalization","on","tokens",".","Need","to","tokenize","first",".","See","Normalizer","for","more","details",".",":","return",":","TextSet","after","normalization","."]
code: def normalize(self):
      """
      Do normalization on tokens.
      Need to tokenize first.
      See Normalizer for more details.
  
      :return: TextSet after normalization.
      """
      jvalue = callZooFunc(
          self.bigdl_type, "textSetNormalize", self.value
      )
      return TextSet(jvalue=jvalue)
  
imports: import six
  from bigdl.util.common import JavaValue
  from zoo.common.utils import callZooFunc
  from pyspark import RDD
label_desc: Use image node_id 18 for calling the TextSet obj's underlying member method code with example usage: obj.normalize() and returns: TextSet