Control table cell (add row, column..)

Hello. I want to dev some of feature to control the table. There are many feature for table the other editor like add columns, rows, set color, reset column width for each cell... I just have a dev plan to implementation on below..add a button on block manager this is a dummy table 3x3. each cell have a text component.customize toolbar on cell add a custom command to insert row above.Add a command in order to insert a row But the problem is...Cannot detect the cell's location. above code just add on canvas below. not inside cell.Cannot add multiple components into the cell. It just added only...