When i do this i get an Error.
public ItemIceSword(ItemIceToolMaterial material) {
super(material);
this.pixyaMaterial = material;
this.maxStackSize = 1;
this.setMaxDamage(material.getMaxUses());
this.setCreativeTab(CreativeTabs.tabCombat);
this.attackDamage = material.getDamageVsEntity();