@Retention(value=RUNTIME) @Target(value=TYPE) public static @interface HostAccess.Implementable
explicit host access policy is set. The annotation to use for
this purpose can be customized with HostAccess.Builder.allowImplementationsAnnotatedBy(Class).
Allowing implementations for all Java interfaces can be enabled with
HostAccess.Builder.allowAllImplementations(boolean).Context.Builder.allowHostAccess(HostAccess),
Value.as(Class),
HostAccess.EXPLICIT