Document static asymmetric visibility.

language/oop5/visibility.xml

@@ -79,7 +79,7 @@ $obj2->printHello(); // Shows Public2, Protected2, Undefined
    <sect3 xml:id="language.oop5.visibility-members-aviz">
     <title>Asymmetric Property Visibility</title>
     <simpara>
-     As of PHP 8.4, properties may also have their
+     As of PHP 8.4, object properties may also have their
      visibility set asymmetrically, with a different scope for
      reading (<literal>get</literal>) and writing (<literal>set</literal>).
      Specifically, the <literal>set</literal> visibility may be
@@ -122,6 +122,42 @@ $b->pubYear = 2023; // Fatal Error
 ]]>
      </programlisting>
     </example>
+    <simpara>
+     As of PHP 8.5, <literal>set</literal> visibility may also be applied to static properties of classes.
+    </simpara>
+    <example>
+     <title>Asymmetric Static Property Visibility</title>
+     <programlisting role="php" annotations="non-interactive">
+<![CDATA[
+<?php
+class Manager
+{
+    public private(set) static int $calls = 0;
+
+    public function doAThing(): string
+    {
+        self::$calls++;
+        // Do other stuff.
+        return "some string";
+    }
+}
+
+$m = new Manager();
+
+$m->doAThing(); // Works
+echo Manager::$calls; // Works
+Manager::$calls = 5; // Fatal error
+?>
+]]>
+     </programlisting>
+     &example.outputs;
+     <screen>
+<![CDATA[
+1
+Fatal error: Uncaught Error: Cannot modify private(set) property Manager::$calls from global scope in /some/file.php
+]]>
+     </screen>
+    </example>
     <para>There are a few caveats regarding asymmetric visibility:</para>
     <itemizedlist>
      <listitem>