code: def _has_png_transformation_pipeline(self):
      return (
          self.frame_transformation_pipeline
          and self.frame_transformation_pipeline.pipeline_string
          and self.frame_transformation_pipeline.pipeline_string.endswith(
              "|PNG"
          )
      )
  
file_path: SerpentAI/serpent/frame_grabber.py
imports: import numpy
  import mss
  from redis import StrictRedis
  from serpent.config import config
  import time
  from serpent.game_frame import GameFrame
  from serpent.game_frame_buffer import GameFrameBuffer
  from serpent.frame_transformation_pipeline import FrameTransformationPipeline
label_desc: Use image node_id 4 for calling the FrameGrabber obj's underlying member method code with example usage: obj._has_png_transformation_pipeline() and returns: unknown