code: public java.util.Map<String, java.util.List<String>> getFields() {
          if (fields == null) {
              fields = new com.amazonaws.internal.SdkInternalMap<String, java.util.List<String>>();
          }
          return fields;
      }
docs: <p>
  The fields returned from a document that matches the search request.
  </p>
  
  @return The fields returned from a document that matches the search request.