pub type ProviderRequestFn = extern "C" fn(req_json: StbStringRef, out: *mut StbString, user_data: *mut c_void) -> i32;Expand description
A provider-injection factory fn (for register_provider). req_json is a
borrowed request envelope; out is an owning response the plugin frees.
The host wraps this into a Provider impl (B4/B5).