Passing headers?

[1Dragoon]

I've got something I'm working on where the majority of the work is done with a REST api, and thus using Reqwest, but one portion of it, just the authentication piece, needs to be interactive using Azure for SAML authentication. That is the component I need wry for, but I'm not sure how to pass headers to wry's webview so it can use cookies. Is there any way to do this? So far I've only seen how you can retrieve headers from an active wry webview session.