自定义的checkboxo多选，三个值，包括一个null
Sizes
Label Positions
Contextual Colors
Three Values
Enclosed Label (Native 2 state)
Value:
Non Enclosed Label (Native 2 state)
Value:
Enclosed Label (Native 3 state)
Value:
Non Enclosed Label (Native 3 state)
Value:
Enclosed Label (2 state)
Value:
Non Enclosed Label (2 state)
Value:
Special Enclosed Label (2 state)
Value:
Enclosed Label (3 state)
Value:
Non Enclosed Label (3 state)
Value:
Text Input Enclosed Label (2 state)
Value:
Text Input Non Enclosed Label (2 state)
Value:
Text Input Enclosed Label (3 state)
Value:
Text Input Non Enclosed Label (3 state)
Value:
Select Input Enclosed Label (2 state)
Value:
Select Input Non-Enclosed Label (2 state)
Value:
Select Input Enclosed Label (3 state)
Value:
Select Input Non-Enclosed Label (3 state)
Value: