code: def _get_rows_height(self):
          
  
          tab = self.grid.current_table
          no_rows = self.grid.code_array.shape[0]
          default_row_height = self.grid.code_array.cell_attributes.\
              default_cell_attributes["row-height"]
  
          non_standard_row_heights = []
          __row_heights = self.grid.code_array.row_heights
          for __row, __tab in __row_heights:
              if __tab == tab:
                  non_standard_row_heights.append(__row_heights[(__row, __tab)])
  
          rows_height = sum(non_standard_row_heights)
          rows_height += \
              (no_rows - len(non_standard_row_heights)) * default_row_height
  
          return rows_height
docs: Returns the total height of all grid rows