add
open override fun addStyleLayer(parameters: Value, position: LayerPosition?): Expected<String, None>
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Adds a new style layer.
See Style Specification - Layers
Runtime style layers are valid until they are either removed or a new style is loaded.
Return
A string describing an error if the operation was not successful, or empty otherwise.
Parameters
parameters
A map of style layer parameters.
position
If not empty, the new layer will be added immediately below the layer with this id.