Function hyper_request_headers 

#[unsafe(no_mangle)]
pub extern "C" fn hyper_request_headers(
    req: *mut hyper_request,
) -> *mut hyper_headers

Available on crate feature ffi and hyper_unstable_ffi only.

Gets a mutable reference to the HTTP headers of this request

This is not an owned reference, so it should not be accessed after the hyper_request has been consumed.