docstr: Visualize the dependency.
  
  Args:
      text(str): input text.
  
  Returns:
      data(numpy.ndarray): a numpy array, use cv2.imshow to show it or cv2.imwrite to save it.
code: def visualize(self, text):
      """
      Visualize the dependency.
  
      Args:
          text(str): input text.
  
      Returns:
          data(numpy.ndarray): a numpy array, use cv2.imshow to show it or cv2.imwrite to save it.
      """
  
      if isinstance(text, str):
          result = self.ddp(text)[0]["visual"]
          return result
      else:
          raise TypeError(
              "Invalid inputs, input text should be str, but type of {} found!".format(
                  type(text)
              )
          )
  
file_path: PaddleHub/modules/text/syntactic_analysis/DDParser/module.py
imports: import os
  import argparse
  import paddlehub
  from paddlehub.module.module import serving, moduleinfo, runnable
  from paddlenlp import Taskflow
label_desc: Use image node_id 5 for calling the ddparser obj's underlying member method code with example usage: obj.visualize(text) and returns: result