I have what I thought would be a simple requirement: sum up the features in the map across all featurelayers. I see that I'm able to have a statistics widget that gives me a count for all features in a featureservice. It would be great if there were a widget where I'd configure it with a list of featurelayers in the map and have it display a number reflecting the total across all those feature services. If there is no such widget, is there a sample custom widget that might be a good starting point for development? Thanks!
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