Hide annotation

Is it possible to hide annotations ?
I use AddAnnotBitmap to add annotation to my pdf.
I understand that i can remove all annotation with "vpage.GetPage().GetAnnot(j).RemoveFromPage();" inside a loop.
But i don't want to delete them, just hide them ! For example with a button to show/hide annot.

Is it possible ?

Thanks

invoke Global.hideAnnots(true);
but in this way all annotations are hidden.

Thanks, that's exactly that i wanted !

But Global.hideAnnots(true); is a private method, is impossible access to it.

Change it from private to public

I tried to change the method hideAnnots to public in Global.java but got this : java.lang.UnsatisfiedLinkError: Native method not found: com.radaee.pdf.Global.hideAnnots:(Z)V . I use 2.9.7 final.

What worked was modifying method default_config() with an annot transparency of 0x00000000.