func (a *ConnWriter) Delivered() bool {
	a.w__.Lock()
	defer a.w__.Unlock()
	return a.delivered
}
// Delivered returns true if the last Write was successfully delivered to the destination.
// Delivered is supported only when the carrier transport is a sandbox, and should be used
// only for test purposes.
Delivered returns true if the last Write was successfully delivered to the destination.
Delivered is supported only when the carrier transport is a sandbox, and should be used
only for test purposes.
// Delivered returns true if the last Write was successfully delivered to the destination . // Delivered is supported only when the carrier transport is a sandbox and should be used // only for test purposes .
func (a *ConnWriter) Delivered() bool {
	a.w__.Lock()
	defer a.w__.Unlock()
	return a.delivered
}
func ( a * ConnWriter ) Delivered ( ) bool { a . w__ . Lock ( ) defer a . w__ . Unlock ( ) return a . delivered }
Delivered returns true if the last Write was successfully delivered to the destination.
Delivered returns true if the last Write was successfully delivered to the destination .