code: def _writeImage(self):
      return self.format(image_sink)
  
file_path: SynapseML/core/src/main/python/synapse/ml/io/IOImplicits.py
imports: import pyspark
  from pyspark import SparkContext
  from pyspark.sql import DataFrame
  from pyspark.sql.types import StructType, StructField
  from synapse.ml.opencv.ImageTransformer import ImageSchema
label_desc: Use image node_id 12 for calling a global function with example usage: _writeImage() and returns: self