Communicational cohesion example

DocsRepository.java

public class DocsRepository {
  
  public Doc findById(DocId id) {
    //method's body
    return doc;
  }
  
  public Doc save(Doc document) {
    //method's body
    return doc;
  }
  
  public Doc findByIdAndType(DocId id, DocType type) {
    //method's body
    return doc;
  }
  
  public List<Doc> findAll() {
    //method's body
    return docsList;
  }  
}