package eu.ehri.project.persistence;
   
   import com.google.common.collect.Multimap;
   
   import java.util.List;
   
   /**
    * A data structure representation of a property graph.
    *
   * @param <N> the concrete type
   */
  public interface NestableData<N> {
  
      Multimap<String, N> getRelations();
  
      List<N> getRelations(String relation);
  
      boolean hasRelations(String relation);
  
      <T> T getDataValue(String key);
  
      N withRelations(Multimap<String, N> relations);
  
      N withRelations(String name, List<N> relations);
  
      N withRelation(String name, N value);
  
      N replaceRelations(Multimap<String, N> relations);
  
      N withDataValue(String key, Object value);
  
      N removeDataValue(String key);
  }