Assigns a stable, unique id to the container element if it doesn't already have one. This is called once, up-front, so that the per-layer buildDataSelector calls don't mutate the DOM as a side-effect.
id
buildDataSelector
The container element to ensure has an ID
Assigns a stable, unique
idto the container element if it doesn't already have one. This is called once, up-front, so that the per-layerbuildDataSelectorcalls don't mutate the DOM as a side-effect.