priority
Sorts annotations in descending order based on this value. A replacement for the deprecated `selected` field. Simultaneous use of `priority` and `selected` fileds should be avoided. Annotations with higher priority keys are drawn and placed first. When equal priorities, less-anchor-options and least-recently-added sequentially used for annotations placement order. `priority` field defaults to 0 when not set explicitly. Negative, 0, positive values could be used in `priority` field. When updating existing annotations, if `priority` is not explicitly set, the current value will be retained.