Event for player size

Hello,

I want to create an event for change the player size.

I have seek in the GiantZombie class and I test this :

event.entityLiving.yOffset *= 6.0F;
event.entityLiving.width *= 6.0F;
event.entityLiving.height *= 6.0F;

But It's doesn't work and the game crash.

And I've test this :

event.entityLiving.myEntitySize = EnumEntitySize.SIZE_4;

But It's did nothing.

Can you help me, please ?

Thanks. (Sorry for mistakes, I'm French )