class_docstr: Run length encoding of a mask.
  
  Don't instantiate this class directly, instead use the classmethods
  `from_coco` and `from_kaggle`.
code: def to_mask(self, h, w) -> "MaskArray":
      return self.to_erles(h=h, w=w).to_mask(h=h, w=w)
  
imports: from icevision.imports import *
  from icevision.utils import *
  from PIL import Image
label_desc: Use image node_id 2 for calling the RLE obj's underlying member method code with example usage: obj.to_mask(h, w) and returns: self