current text:

    /**
     * * {@preview Associated with sealed classes, a preview feature of the Java language.
     *
     * This method is associated with <i>sealed classes</i>, a preview
     * feature of the Java language. Preview features
     * may be removed in a future release, or upgraded to permanent
     * features of the Java language.}
     *
     * Returns {@code true} if and only if this {@code Class} object represents a sealed class or interface.
     * If this {@code Class} object represents a primitive type, {@code void}, or an array type, this method returns
     * {@code false}.
     *
     * @return {@code true} if and only if this {@code Class} object represents a sealed class or interface.

there is an additional `*` in front of @preview but also consider:
     ...
     * Returns {@code true} if and only if this {@code Class} object represents a sealed class or interface.
     * If this {@code Class} object represents a primitive type, {@code void}, or an array type, this method returns
 - * {@code false}.
+ * {@code false}. This method has no relationship to {@link Package#isSealed() Package::isSealed}.