Method async_start

crates/wasmtime/src/runtime/component/concurrent.rs:4157–4179

(
        &mut self,
        instance: Instance,
        callback: *mut VMFuncRef,
        post_return: *mut VMFuncRef,
        callee: NonNull<VMFuncRef>,
        param_count: u32,
        result_cou

    }

    unsafe fn async_start(
        &mut self,
        instance: Instance,
        callback: *mut VMFuncRef,
        post_return: *mut VMFuncRef,
        callee: NonNull<VMFuncRef>,
        param_count: u32,
        result_count: u32,
        flags: u32,
    ) -> Result<u32> {
        unsafe {
            instance.start_call(
                StoreContextMut(self),
                callback,
                post_return,
                callee,
                param_count,
                result_count,
                flags,
                None,
            )
        }
    }

    fn future_write(
        &mut self,