Description

Every implementation in demo/avl has signed size, which may cause issues as:

• GetByIndex with negative index, which is considered as valid index.
• TraverseByOffset with negative offset and size, which can let us set a negative limit

if limit <= 0 || offset >= node.size {

• Confuse users when they use avl/list Size as nextID with a big tree, which wont be equal to its key over 2^31 size (idgen == uint64, size == int).

I believe it's not a good practice and it could reveal later some underlying issues due to that implementation.