Deleting the entered names in the "TO" field using NSTokenField

I am working with NSTokenFi开发者_开发技巧eld, the requirement is similar to apple mail application. I have delegate methods to format the strings and add to the field. Do I get any delegate method for deletion of the tokens, as of now I am not able to get the control for deletion of the text. Could any one please help?

Please check this post - Callback for deleting NSTokenFieldCell

And this - no tokenField:willDeleteObjects:

Hope this helps !