presto-hive/src/main/java/io/prestosql/plugin/hive/metastore/file/FileHiveMetastore.java/FileHiveMetastore/getPartitionMetadataDirectory
class FileHiveMetastore:    private Path getPartitionMetadataDirectory(Table table, String partitionName)
    {
        Path tableMetadataDirectory = getTableMetadataDirectory(table);
        return new Path(tableMetadataDirectory, partitionName);
    }