Why does the object's cleaning function now depend on the type of collection?

[marat1961]

Why does the object's cleaning function now depend on the type of collection?

1. The collection cleanup method now passes the node address of the collection.
   For example, if it is a unidirectional list, then the node contains the next field besides the user defined type UDT.
   For hashmap node, we need Pair<Key, Value> (two UDTs).
2. The structure is part of the node (aggregated into a node).
3. In general case there can be several such structures.
   The type of a node can be described by a tuple of types.
4. Each element of a tuple is described by its own metadata.
5. A collection must create a description of a tuple of a node (metadata),
   based on the user type descriptions (metadata) received from the client.
6. We need to update the implementation of collections so that,
   so that the collection has enough metadata for UDT.