Github user tomatophantastico commented on the issue: https://github.com/apache/metamodel/pull/153 w.r.t. guavas Lists.newArrayList() I think i used it mainly in the testcases, purely for syntactic convenience. Internally ArrayLists should be used as it allows for more freedom on how to create the objects, and then wrap with Collections.unmodifiableList, as for example done in ImmutableTable.
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