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Reference to the left subtree of the current node.
Source position: avl_tree.pp line 45
public TAVLTreeNode.Left : TAVLTreeNode;  | 
Left contains a reference to the first node in the left subtree of the current node. It is Nil if there is no left subtree.
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Reference to the parent node in the tree.  | 
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Reference to the right subtree of the current node.  |