public Builder withFilter(String filterString) {
      this.filterString = filterString;
      return this;
    }
This class should be used to build {@link ReadEntity}. It follows builder
pattern, letting you build your {@link ReadEntity} with whatever level of
detail you want.
hcatalog/core/src/main/java/org/apache/hive/hcatalog/data/transfer/ReadEntity.java