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Phillip Webb
5695192850
Fix `SpringIterableConfigurationPropertySource` to ensure that cached descendants are always updated on a refresh. The cache implementation assumes that it is safe to reuse previous `mappings` and `reverseMappings` data since it doesn't matter if superfluous values are included. For `descendants` however, we always want to recalculate values so that we don't get false positives. Unfortunately, prior to this commit, we only updated the descendants if a reverseMapping was added. The meant that on a cache refresh, existing descendants were removed. Fixes gh-45639