ddUnregTrigger

ddUnregTrigger( 
t_triggerName 
s_triggerFunc 
) 
=> t / nil

Removes a callback (trigger function) from a named list of trigger functions.

t_triggerName	Name of the trigger to remove the callback from. Refer to the `ddRegTrigger` definition for a list of the permissible values of t_triggerName.
s_triggerFunc	The function to remove from the trigger’s callback list.

`t`	The function was successfully unregistered and will no longer be triggered when the event occurs.
`nil`	s_triggerFunc has not been registered as a trigger for t_triggerName.

ddUnregTrigger( "preCheckIn" ’checkinTrigFunc ) => t