Function slint_interpreter_value_to_model 

#[unsafe(no_mangle)]
pub extern "C" fn slint_interpreter_value_to_model(
    val: &Value,
    vtable: &ModelAdaptorVTable,
) -> *const u8

Available on crate feature ffi only.

If the value contains a model set from [slint_interpreter_value_new_model] with the same vtable pointer, return the model that was set. Returns a null ptr otherwise