CommandHolder <CommandSender > holder =
    CommandStructure. create (CommandSender. class, (s, perm, tablist ) -> {
        return s. hasPermission (perm ) ;
    }, (s, structure, args ) -> {
        if (s instanceof Player ) {
            new AnvilGUI ( "Anvil", (Player )s ). setInsertable ( true ) ;
        } else s. sendMessage ( "/anvil [player]" ) ;
    } ). permission ( "anvil.command" )
    . fallback ( (s, structure, args ) -> {
        s. sendMessage ( "Oh-h.. player " +args [ 0 ] + " not found!" ) ;
    } )
    . selector (Selector. PLAYER, (s, structure, args ) -> {
        new AnvilGUI ( "Anvil", Bukkit. getPlayer (args [ 0 ] ) ). setInsertable ( true ) ;
    } ). permission ( "anvil.command.other" ). build ( ) ;
holder. register ( "anvil" ) ;