Google Maps v3 - marker and overlay map type load event?

I need to detect when all markers and overlay map types are loaded to the map. I was searching for proper events, but I couldn't find any.

Is there an event triggered when marker is fully loaded?

And similarly, is there an event triggered when overlay map type is loaded? I know that there's actually tilesloaded event for google.maps.Map开发者_如何学JAVA, but it seems to work only for the base map types.

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I use google.maps.event.addListenerOnce(this.map,'idle',callback) to determine when everything is loaded.