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	public int getElementCount() {		if(root == null) {			return 0;		} else if(root != null && root.left == null && root.right == null) {			return 1;		} else {			return getElementCount(0, root.left)+getElementCount(0, root.right)+1;		}	}		public int getElementCount(int count, Node currentNode) {		if(currentNode != null && currentNode.left != null) {			getElementCount(count++, currentNode);		} 		if(currentNode != null && currentNode.right != null) {			getElementCount(count++, currentNode);		}		return count;	}		public int getTreeHeight() {		return 0;	}		public int getLeafCount() {		return 0;	}