The state value that the checkbox is checked.
If the enableRowChecked value of the TrinaColumn property is set to true,
a check box appears in the cell of the corresponding column.
To manually change the values at runtime,
use the TrinaStateManager.setRowChecked
or TrinaStateManager.toggleAllRowChecked methods.
Indicates if the row should be frozen at the top or bottom of the grid
TrinaRowFrozen.none means the row is not frozen
TrinaRowFrozen.start means the row is frozen at the top
TrinaRowFrozen.end means the row is frozen at the bottom