Specifies the source of data for the legend.
Specifies the type of the legend grouping.
The VectorMap's legend supports three grouping types.
Available for markers of a bubble type only. Can be used if you have grouped bubble markers in several groups and specified a size for bubbles in each group. For more information, refer to the sizeGroupingField and sizeGroups option descriptions.
Specifies a layer to which the legend belongs.
Pass a layer name to this option.