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Yes, the [`"BinaryTree"`][1], [`"AVLTree"`][2], and [`"RedBlackTree"`][3] data structures each support an `"InOrderScan"` operation. [1]: https://reference.wolfram.com/language/ref/datastructure/BinaryTree.html [2]:...
You are right. => and => look the same but in \{DoubleRightArrow] there is a space between esc and =