code: def getGrid(self, row: int, col: int) -> Tuple[np.ndarray]:
      img, _ = self.raster.getGrid(row, col)
      mask = self.mask_grids[row][col]
      self.curr_idx = (row, col)
      return img, mask
  
file_path: PaddleSeg/EISeg/eiseg/plugin/n2grid/rs_grid.py
imports: import numpy
  from typing import List, Tuple
  from eiseg.plugin.remotesensing.raster import Raster
label_desc: Use image node_id 4 for calling the RSGrids obj's underlying member method code with example usage: obj.getGrid(row, col) and returns: img,  mask