A legend item, which often represents a sub-class of features in a layer in the case of categorical or classed layers.
title:
string|string[]
The title of the legend item.
titleDependsOnZoom:
boolean
Whether the title depends on the zoom level or not. If it does, you need to call getLegendItem when the zoom level changes.
Note that as the zoom level changes, the onLegendItemChange handler will not be called, so you need to call getLegendItem yourself.
visible:
boolean
Whether the legend item is visible or not.
id:
string
The id of the legend item.
layerId:
string
The id of the layer the legend item belongs to.