AKA Label Clustering.
Sometimes I have multiple features that I need to be distinct (for example, points that need to remain as multiple visible points as opposed to a clustered single point) but all of those points have exactly the same callout. Manual cleanup ensues, and often times I would like to have a single callout box, with multiple arrows pointing to the various similarly attributed features.
Here's a relatively poor example of what I mean (it would be much cleaner ideally):
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