class_docstr: Creates ShapelyAnnotation (as shapely MultiPolygon).
  Can convert this instance annotation to various formats.
code: def get_simplified_shapely_annotation(self, tolerance=1):
      shapely_multipolygon = MultiPolygon(
          [self.multipolygon.simplify(tolerance)]
      )
      shapely_annotation = ShapelyAnnotation(shapely_multipolygon)
      return shapely_annotation
  
imports: from typing import List
  from shapely.geometry import CAP_STYLE, JOIN_STYLE, MultiPolygon, Polygon, box
label_desc: Use image node_id 15 for calling the ShapelyAnnotation obj's underlying member method code with example usage: obj.get_simplified_shapely_annotation(tolerance) and returns: shapely_annotation