How to change player abiltities

[MCArTyR]

I want to make it so that when the chestplate is on, the player can fly. Here is my code:

@SubscribeEvent
    public static void onEquipmentChange(LivingEquipmentChangeEvent event){
        if (!(event.getEntity() instanceof PlayerEntity)) return;
        PlayerEntity player = (PlayerEntity) event.getEntity();
        if(player.isCreative()) return;

        if(event.getSlot().equals(EquipmentSlotType.CHEST)){
            Item item = event.getTo().getItem();

            if(event.getFrom().getItem().equals(RegistryHandler.RUBY_CHESTPLATE.get())){
                player.abilities.mayfly = false;
            }

            if(item != null && item.equals(RegistryHandler.RUBY_CHESTPLATE.get())){
                player.abilities.mayfly = true;
                }
        }
    }

But the player still cannot fly.

[diesieben07]

You have to call onUpdateAbilities after changing the abilities.

[MCArTyR]

What class is this method from?

UPD: Found.

Edited June 28, 2021 by MCArTyR

[diesieben07]

PlayerEntity

[MCArTyR]

Thank you. It works now.