def change_font_name(new_font_name = 'Verdana')
      validate_worksheet

      font = get_cell_font.dup
      font.set_name(new_font_name)
      update_font_references(font)
    end
def change_font_name(new_font_name = 'Verdana')
      validate_worksheet

      font = get_cell_font.dup
      font.set_name(new_font_name)
      update_font_references(font)
    end
Changes font name of cell