code: def save(self, saveas=None):
      if saveas is None:
          saveas = self.saveas
      if saveas.lower().endswith(".jpg") or saveas.lower().endswith(
          ".png"
      ):
          cv2.imwrite(
              saveas,
              self._get_buffer()[:, :, ::-1],
          )
      else:
          self.fig.savefig(saveas)
  
imports: import colorsys
  import io
  import matplotlib
  import matplotlib.colors
  import matplotlib.figure
  import numpy
  import torch
  from matplotlib.backends.backend_agg import FigureCanvasAgg
  import cv2
  from utils import img_tensorize
label_desc: Use image node_id 6 for calling the SingleImageViz obj's underlying member method code with example usage: obj.save(saveas) without return types