code: public Optional<Path> getPartitionSchemaUrl() {
      return StringUtils.isNotBlank(this.getProp(HIVE_PARTITION_SCHEMA_URL_KEY)) ? Optional.<Path> of(new Path(this.getProp(HIVE_PARTITION_SCHEMA_URL_KEY)))
          : Optional.<Path> absent();
    }
docs: Get the schema url path for the partition if this {@link WorkUnit} is for a partitioned table.
  If not, return {@link Optional#absent()}