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I

intersects(Actor) - Method in class greenfoot.Actor
Check whether this object intersects with another given object.
isPlaying() - Method in class greenfoot.GreenfootSound
True if the sound is currently playing.
isStorageAvailable() - Static method in class greenfoot.UserInfo
Indicate whether storage is available.
isTouching(Class) - Method in class greenfoot.Actor
Checks whether this actor is touching any other objects of the given class.
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