public GetPartitionProjectionsSpecBuilder addProjectFieldList(List<String> fields) {
        fieldList.addAll(Arrays.asList("catName","dbName","tableName"));
        if (CollectionUtils.isNotEmpty(fields)) {
            fieldList.addAll(fields);
        }
        return this;
    }
Builder for the GetProjectionsSpec. This is a projection specification for partitions returned from the HMS.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/client/builder/GetPartitionProjectionsSpecBuilder.java