Get a RequestInit object for the given url, adding optional headers. If the url is in the TrustedServers {@see https://cesium.com/learn/cesiumjs/ref-doc/TrustedServers.html?classFilter=Trusted} credentials will be included in the request.
Optional
Get a RequestInit object for the given url, adding optional headers. If the url is in the TrustedServers {@see https://cesium.com/learn/cesiumjs/ref-doc/TrustedServers.html?classFilter=Trusted} credentials will be included in the request.