docstr: add image blocks with formatted grid specification
  
  Args:
      image_list (list): the list of image_paths
      grid_spec (dict): indicate image size and position
          - key: image_name, or index if image_set is a list
          - value: (x,y,w,h) position and weight/height of image,
                with left top corner of the block as (0,0), unit in mm
      notes (str): explain the block
docstr_tok: ["add","image","blocks","with","formatted","grid","specification","Args",":","image_list","(","list",")",":","the","list","of","image_paths","grid_spec","(","dict",")",":","indicate","image","size","and","position","-","key",":","image_name",",","or","index","if","image_set","is","a","list","-","value",":","(","x",",","y",",","w",",","h",")","position","and","weight\/height","of","image",",","with","left","top","corner","of","the","block","as","(","0,0",")",",","unit","in","mm","notes","(","str",")",":","explain","the","block"]
code: def add_images_grid(
      self, image_list: list, grid_spec: list, notes=None
  ):
      """
      add image blocks with formatted grid specification
  
      Args:
          image_list (list): the list of image_paths
          grid_spec (dict): indicate image size and position
              - key: image_name, or index if image_set is a list
              - value: (x,y,w,h) position and weight/height of image,
                    with left top corner of the block as (0,0), unit in mm
          notes (str): explain the block
      """
      from xai.formatter.contents import BasicImageGrid
  
      self.contents.append(
          BasicImageGrid(
              image_list=image_list, grid_spec=grid_spec, notes=notes
          )
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  from typing import Tuple, Dict, List
  from xai.data import explorer
  from xai import MODE
label_desc: Use image node_id 13 for calling the Section obj's underlying member method code with example usage: obj.add_images_grid(image_list, grid_spec, notes) without return types