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void w_cancel(dispatch p, date d);
cancels the event identified by the d object
dispatch w_defer(dispatch p, integer s, object z, ...);
is p, schedules a call (an event) against the p dispatcher object of the function indicated by z, with the unnamed arguments and in s seconds from the time of the call
dispatch w_program(dispatch p, date d, object z, ...);
is p, schedules a call (an event) against the p dispatcher object of the function indicated by z, with the unnamed arguments and at the time indicated by d. The d object is recorded and will further identify the scheduled event.
dispatch w_schedule(dispatch p, date d, object z, ...);
is p, schedules a call (an event) against the p dispatcher object of the function indicated by z, with the unnamed arguments and at the time indicated by d