code: def _flip_masks_left_right(masks):
      """Left-right flip masks.
  
      Args:
        masks: rank 3 float32 tensor with shape
          [num_instances, height, width] representing instance masks.
  
      Returns:
        flipped masks: rank 3 float32 tensor with shape
          [num_instances, height, width] representing instance masks.
      """
      return masks[:, :, ::-1]
  
file_path: DALI/docs/examples/use_cases/tensorflow/efficientdet/pipeline/tf/preprocessor.py
imports: import tensorflow.compat.v1
  from pipeline.anchors_utils import box_list
label_desc: Use image node_id 2 for calling a global function with example usage: _flip_masks_left_right(masks) and returns: masks