code: def shift_intensity(
      x_factor: float, y_factor: float, **kwargs
  ) -> float:
      assert (
          isinstance(x_factor, (float, int))
          and 0 <= x_factor <= 1
          and isinstance(y_factor, (float, int))
          and 0 <= y_factor <= 1
      ), "x_factor & y_factor must be positive numbers in [0, 1]"
  
      return (1 - x_factor) * (1 - y_factor) * 100.0
  
imports: from typing import Any, Dict, List, Optional, Tuple
  import numpy
  from augly.image import intensity, utils
  from augly.video.helpers import get_video_info
label_desc: Use image node_id 40 for calling a global function with example usage: shift_intensity(x_factor, y_factor) and returns: unknown