Fire the onset() handlers for this property.

        Args:
            node (synapse.lib.node.Node): The node whose property was set.
            oldv (obj): The previous value of the property.

async def wasSet(self, node, oldv):
        '''
        Fire the onset() handlers for this property.

        Args:
            node (synapse.lib.node.Node): The node whose property was set.
            oldv (obj): The previous value of the property.
        '''
        for func in self.onsets:
            try:
                await s_coro.ornot(func, node, oldv)
            except asyncio.CancelledError:
                raise
            except Exception:
                logger.exception('onset() error for %s' % (self.full,))