Throws {@code IllegalStateException}, if the cursor isn't pointing to any element: if it is in front of the first element, after the last, or the current element has been removed using {@link #remove()} operation. @return the element to which the cursor currently points @throws IllegalStateException if this cursor is initially in front of the first elementand {@link #moveNext()} hasn't been called yet,or the previous call of {@code moveNext} returned {@code false}, or {@code remove()} has been performed after the previous cursor movement
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