A function used by TreeSelection.setSelectFunction to filter whether or not a row may be selected. It is called whenever a row's state might change. A return value of TRUE indicates to selection that it is okay to change the selection.
TRUE, if the selection state of the row can be toggled
A function used by TreeSelection.setSelectFunction to filter whether or not a row may be selected. It is called whenever a row's state might change. A return value of TRUE indicates to selection that it is okay to change the selection.