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Links can be attached to contraptions in chains, causing trees of dependencies of the order they need to be deleted when the contraption is assembled. This change makes so the information of that dependency (the insertion order to the HashMap) is not lost by using a LinkedHashMap, and it is used to remove the blocks in the proper order by inverting that LinkedHashMap before the iterations. This fixes #9214.
It's a proposal cose I only used data structures of "java.util.". Any HashMap that guarantees that the iteration order will be the insertion one and it can be iterated in reverse would be a nice candidate, even if its a custom one.