javascript - how to execute google maps event "bounds_changed" only once -

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how tell google map event "bounds_change" work when map loaded, , not after user change?

from documentation

addlisteneronce(instance:object, eventname:string, handler:function(?))
return value: mapseventlistener addlistener, handler removes after handling first event.

google.maps.event.addlisteneronce(map,'bounds_changed', function() {});

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