Gets a command to apply (or cancel) border settings of the bottom border for the selected cells.
readonly toggleTableCellBottomBorder: ToggleTableCellBottomBorderCommand
A ToggleTableCellBottomBorderCommand object that provides methods for executing the command and checking its state.
You can invoke this command by calling the execute method.
The execute method checks the command state (obtained using the getState method) before executing, and decides whether the action can be performed. The execute and getState methods are members of the ToggleTableCellBottomBorderCommand class.
The command applies border settings that you can modify using the RichEditCommands.changeTableBorderRepositoryItem command.