| choices | A list of choices to populate the field. | 
| defaultValue | The initial mask value for this field. | 
| formatSelectedValueCallback | A callback to format the selected value. Unity calls this method automatically when a new value is selected in the field.. | 
| formatListItemCallback | The initial mask value this field should use. Unity calls this method automatically when displaying choices for the field. | 
Initializes and returns an instance of MaskField.
| label | The text to use as a label for the field. | 
| choices | A list of choices to populate the field. | 
| defaultValue | The initial mask value for this field. | 
| formatSelectedValueCallback | A callback to format the selected value. Unity calls this method automatically when a new value is selected in the field.. | 
| formatListItemCallback | The initial mask value this field should use. Unity calls this method automatically when displaying choices for the field. | 
Initializes and returns an instance of MaskField.
Initializes and returns an instance of MaskField.
| label | The text to use as a label for the field. | 
Initializes and returns an instance of MaskField.