class_docstr: Clips visual output to a rectangular region.
docstr: The transform that maps from framebuffer coordinates to clipping
  coordinates.
code: def transform(self):
      """The transform that maps from framebuffer coordinates to clipping
      coordinates.
      """
      return self._transform
  
file_path: vispy/vispy/visuals/filters/clipper.py
imports: from .base_filter import Filter
  from ..transforms import NullTransform
  from ...geometry import Rect
label_desc: Use image node_id 4 for calling the Clipper obj's underlying member method code with example usage: obj.transform() and returns: self