docs: def getGrid(self, use_mask=True):
          """
          Returns GDALGrid object of GSSHA model bounds
  
          Paramters:
              use_mask(bool): If True, uses watershed mask. Otherwise, it uses the elevaiton grid.
  
          Returns:
              GDALGrid
  
          """
          grid_card_name = "WATERSHED_MASK"
          if not use_mask:
              grid_card_name = "ELEVATION"
  
          return self.getGridByCard(grid_card_name)