radiobox

// Radioboxes are similar to checkboxes, except that only one in a group
// can be checked at a time
auto group = new RadioboxGroup;
auto box1 = radiobox(group);
auto box2 = radiobox(group);

box1.select();

assert(box1.isChecked);

// Checking the other box will uncheck the previous one
box2.select();

assert(!box1.isChecked);
assert(box2.isChecked);