Modifying The Method To Clear Collection?

I have wrote the method delete turtle below. Which is part of turtle collection (Hashmap)

public void deleteTurtle(String name) {
Iterator iterate = turtles.keySet().iterator();
while(iterate.hasNext()) {
String key = (String)iterate.next();
if(key.equals(name)) {
iterate.remove();
} else {
setErrorMessage("notFound");
}
}
}

I need to now modify it so the method ensures that the turtles shape collection is cleared before the Turtle object is deleted.