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                                Change Return Type	Optional<Map<String,Map<String,ColumnStatistics>>> to Optional<Map<String,Map<String,HiveColumnStatistics>>> in method public getPartitionColumnStatistics(databaseName String, tableName String, partitionNames Set<String>, columnNames Set<String>) : Optional<Map<String,Map<String,HiveColumnStatistics>>> in class com.facebook.presto.hive.metastore.file.FileHiveMetastore | 
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                                Change Return Type	Optional<Map<String,ColumnStatistics>> to Optional<Map<String,HiveColumnStatistics>> in method public getTableColumnStatistics(databaseName String, tableName String, columnNames Set<String>) : Optional<Map<String,HiveColumnStatistics>> in class com.facebook.presto.hive.metastore.TestingHiveMetastore | 
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                                Change Return Type	Optional<Map<String,Map<String,ColumnStatistics>>> to Optional<Map<String,Map<String,HiveColumnStatistics>>> in method public getPartitionColumnStatistics(databaseName String, tableName String, partitionNames Set<String>, columnNames Set<String>) : Optional<Map<String,Map<String,HiveColumnStatistics>>> in class com.facebook.presto.hive.metastore.TestingHiveMetastore | 
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                                Change Return Type	Optional<Map<String,ColumnStatistics>> to Optional<Map<String,HiveColumnStatistics>> in method public getTableColumnStatistics(databaseName String, tableName String, columnNames Set<String>) : Optional<Map<String,HiveColumnStatistics>> in class com.facebook.presto.hive.metastore.file.FileHiveMetastore | 
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