The layers specified in block are put above the layer (i.e. in front of it) with the given layerId from the base map style.
The layers specified in block are put at the given Anchor.
The layers specified in block are put below the layer (i.e. behind it) with the given layerId from the base map style.
The layers specified in block are put at the bottom, i.e. behind of all other layers.
The layers specified in block replace the layer (i.e. are shown instead of it) with the given layerId from the base map style.
The layers specified in block are put at the top, i.e. in front of all other layers.