code: def get_cell_lines(self, column_idx):
          '''
              ''returns:
              the lines of the cell specified by the column_idx or an empty list if the column does not exist
          '''
          return [] if column_idx >= len(self.columns) else self.columns[column_idx].get_cell_lines(f get_cell_lines(self, column_idx):
          '''
              ''returns:
              the lines of the cell specified by the column_idx or an empty list if the column does not exist
          '''
          return [] if column_idx >= len(self.columns) else self.columns[column_idx].get_cell_lines()
docs: ''returns:
              the lines of the cell specified by the column_idx or an empty list if the column does not exist