{"default": "PutIfAbsentMergePolicy", "type": "string", "examples": ["ExpirationTimeMergePolicy", "HyperLogLogMergePolicy", "HigherHitsMergePolicy", "PutIfAbsentMergePolicy", "DiscardMergePolicy", "LatestUpdateMergePolicy", "PassThroughMergePolicy", "LatestAccessMergePolicy"]}