Hello there! I am currently developing a BlockRestrict Plugin but one of the few blocks that does not work is a skull. I need to make it so the system will only block the unique skull. For example; Currently; I Restrict placement of wither skeleton skull - the system says 'That is not a block!' What I would like; I restrict placement of wither skeleton skull - success - I can place a zombie head and not a wither skeleton skull Is there a way I could do this? Many Thanks.