Method pocketmine\item\Mace::getDamager() is unused.

Method pocketmine\item\Mace::onAttackEntity() has parameter $returnedItems with no value type specified in iterable type array.

Parameter #1 $damager (pocketmine\event\entity\EntityDamageByEntityEvent) of method pocketmine\item\Mace::onAttackEntity() is not contravariant with parameter #1 $victim (pocketmine\entity\Entity) of method pocketmine\item\Item::onAttackEntity().

Parameter #2 $victim (pocketmine\entity\Entity) of method pocketmine\item\Mace::onAttackEntity() is not contravariant with parameter #2 $returnedItems (array) of method pocketmine\item\Item::onAttackEntity().

Parameter #2 $victim of method pocketmine\item\Mace::onAttackEntity() is not passed by reference but parameter #2 $returnedItems of method pocketmine\item\Item::onAttackEntity() is passed by reference.

Parameter #3 $returnedItems of method pocketmine\item\Mace::onAttackEntity() is not optional.

Call to an undefined method pocketmine\event\entity\EntityDamageEvent::getDamager().