presto-main/src/main/java/io/prestosql/sql/planner/plan/StatisticAggregationsDescriptor.java/StatisticAggregationsDescriptor/deserializeKey
class StatisticAggregationsDescriptor:        @Override
        public ColumnStatisticMetadata deserializeKey(String key, DeserializationContext ctxt)
        {
            return deserialize(requireNonNull(key, "key is null"));
        }