An origin to match against request URLs.
URLs matching this origin pattern will use the configured proxyUrl (if present)
or the default proxy URL.
Origins must contain protocol, a hostname and (optionally) a port.
For example, https://subdomain.arcgis.com is a valid origin.
OptionalproxyURL to a server endpoint that can act as proxy. If this URL is not specified, a default proxy will be used.
Specifies a proxy rule. Requests targeting the
originserver of a proxy rule will use the configured proxy server to fetch the resource.