TreeGridContainer Checkbox cell

As per documentation it should be possible to add checkbox in grid.

The documentation states: "There is also a possibility to insert checkbox in cell. See TEXT parameter description". There is no TEXT paremeter description in the documentation. Is there a sample floating around. I am using the Project TreeGridContainer as template meaning im using the good old xlst transformation, is there a specific attribute i should write in the <column element same as with list> for example for list you use edit="COMBO:id