add
open override fun addPersistentStyleCustomLayer(layerId: String, layerHost: CustomLayerHost, layerPosition: LayerPosition?): Expected<String, None>
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Adds a new style custom layer.
Note: This is an experimental API and is a subject to change.
Whenever a new style is being parsed and currently used style has persistent layers, an engine will try to do following:
keep the persistent layer at its relative position
keep the source used by a persistent layer
keep images added through
addStyleImagemethod
In cases when a new style has the same layer, source or image resource, style's resources would be used instead and MapLoadingError event will be emitted.
Return
A string describing an error if the operation was not successful, or empty otherwise.
Parameters
layerHost
The custom layer host.
layerId
A style layer identifier.
layerPosition
If not empty, the new layer will be positioned according to layer position parameters.