@Override @NotNull public NodeState getNodeState() { return head().getImmutableNodeState(); }
@Override @Nonnull public NodeState getNodeState() { return head().getImmutableNodeState(); }
@Override @NotNull public NodeState getNodeState() { return head().getImmutableNodeState(); }
@Override @Nonnull public NodeState getNodeState() { return head().getImmutableNodeState(); }