Endpoint, protocol, configured layers/styles and extra parameters.
CRS and selected layer IDs in rendering order.
Tile bounds in public XY order; serialized according to WMS axes.
Requested integer tile width in pixels.
Requested integer tile height in pixels.
Absolute request URL, potentially containing transport credentials; do not log it or store it as snapshot provenance. Direct callers must validate dimensions/extent themselves; createWmsProvider does so before requests.
Construct a single WMS PNG GetMap URL without sending a request.