code: def size(self):
      return len(self.tokens)
  
file_path: nlpaug/nlpaug/util/doc/doc.py
imports: from nlpaug.util.doc.token import Token
  from nlpaug.util.doc.change_log import ChangeLog
label_desc: Use image node_id 9 for calling the Doc obj's underlying member method code with example usage: obj.size() and returns: len