The image data, in any format MapLibre's addImage accepts. Asynchronous
sources, such as URLs and SVG strings, aren't supported here. Pre-load them and
pass an HTMLImageElement, ImageBitmap or ImageData instead.
OptionaloptionsThe MapLibre image metadata pixelRatio, sdf, stretchX, stretchY and content,
forwarded verbatim to addImage.
The specification of a single custom image that a CustomGeoJSONModule registers on the map. The module re-registers every image automatically after every style change, so symbol layers in CustomGeoJSONSourceSpec.layers can reference an image by ID and survive
setStylecalls without extra wiring.