textNullableChild
inline fun <T, V> TextView.textNullableChild(parent: CSHasChangeValue<T>, crossinline child: (T) -> CSHasChangeValue<V>?, noinline text: (V?) -> Any): CSRegistration
inline fun <ParentValue, ParentChildValue, ChildValue> TextView.textNullableChild(parent: CSHasChangeValue<ParentValue>, crossinline parentChild: (ParentValue) -> CSHasChangeValue<ParentChildValue>?, crossinline child: (ParentChildValue) -> CSHasChangeValue<ChildValue>?, crossinline text: (ChildValue?) -> Any): CSRegistration