code: def empty_generator():
      return iter([])
  
imports: import math
  import numpy
  import pytest
  from shapely import GeometryCollection, LinearRing, LineString, MultiLineString, MultiPoint, MultiPolygon, Point, Polygon
  from shapely.geometry import mapping, shape
  from shapely.geometry.base import BaseGeometry, EmptyGeometry
label_desc: Use image node_id 1 for calling a global function with example usage: empty_generator() and returns: iter