Unset static properties

Hi internals, I came across this when playing with static properties: class A { public static int $x; } // This throws, as expected: // Error: Typed static property A::$x must not be accessed before initialization echo A::$x; // Once we initialize the property: A::$x = 1; echo A::$x; // 1 // There is no way to revert the property back to uninitialized state: // Error: Attempt to unset static property A::$x unset(A::$x); Is this expected behaviour? I don't currently have a use case for this, but am wondering whether it is consistent to disallow un-initializing a static property when it's allowed to be uninitialized in the first place. Cheers, Ben