code: public static void setAccessible(@NotNull AccessibleObject o, boolean accessible) {
      AccessController.doPrivileged(new SetAccessibleAction(o, accessible));
    }
docs: Sets the {@code accessible} flag of the given {@code AccessibleObject} to the given {@code boolean} value.
  
  @param o          the given {@code AccessibleObject}.
  @param accessible the value to set the {@code accessible} flag to.
  @throws NullPointerException if the given  {@code AccessibleObject} is {@code null}.
  @throws SecurityException    if the request is denied.