class_docstr: Holds the path to mask image file.
  
  # Arguments
      filepath: Path to the mask image file.
code: def to_coco_rle(self, h, w) -> List[dict]:
      return self.to_mask(h=h, w=w).to_coco_rle(h=h, w=w)
  
imports: from icevision.imports import *
  from icevision.utils import *
  from PIL import Image
label_desc: Use image node_id 3 for calling the MaskFile obj's underlying member method code with example usage: obj.to_coco_rle(h, w) and returns: self