get
  suspend fun MapboxMap.getFeatureState(sourceId: String, sourceLayerId: String? = null, featureId: String): Expected<String, Value>
Get the state map of a feature within a style source.
Note that updates to feature state are asynchronous, so changes made by other methods might not be immediately visible.
Return
a feature state value or a string describing an error.
Parameters
source
The style source identifier.
source
The style source layer identifier (for multi-layer sources such as vector sources).
feature
The feature identifier of the feature whose state should be queried.