minetest.register_craftitem("mtz_tests:treespawner", {
    description = "Test Experimental Tree",
    inventory_image = "default_stick.png",
    on_use = function(itemstack, user, pointed_thing)
        local playername = user:get_player_name()
        local hasprivs = minetest.check_player_privs(playername, {tester=true})
        if hasprivs == true then
            print("Privs ok for " .. playername)
        end
        if (hasprivs == true) and (pointed_thing.type == "node") then
            local pos = pointed_thing.above
            minetest.env:spawn_tree(pos, experimental_tree)
        end
    end
})