Reference to the left subtree of the current node.
Source position: avl_tree.pp line 53
| 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.
| 
 | Reference to the parent node in the tree. | |
| 
 | Reference to the right subtree of the current node. |