<itemvalue="The sewage tank is currently empty, and there is sufficient clean water. Please confirm that the drainage pipe is in the lowered position before starting the self-cleaning of the sewage tank."/>
<itemvalue="Please confirm the drainage pipe is in the lowered position before starting self-cleaning."/>
<itemvalue="allow snapshotting"/>
@ -61,13 +62,12 @@
<itemvalue="A type representing values that are either `Future<T>` or `T`. This class declaration is a public stand-in for an internal future-or-value generic type, which is not a class type. References to this class are resolved to the internal type. It is a compile-time error for any class to extend, mix in or implement `FutureOr`."/>