anchor.diff:  Content repositories can therefore optionally be made searchable by extending the `Searchable<CID>` interface.
   
   [source, java]
  +.Searchable interface
   ----
   public interface Searchable<CID> {
   
  
positive.code: 
  . Inject the repositories and use them
  +
  [source, java]
  ----
  public class SomeClass {
  
negative.code:   	@Autowired private SopDocumentContentRepository contentRepo;
  
  	public void doSomething() {
  	
  		SopDocument doc = new SopDocument();
  		doc.setTitle("example");
  		contentRepo.setContent(doc, new ByteArrayInputStream("some interesting content".getBytes())); # <1>
  		doc.save(); 
  		...
  		
  		InputStream content = repository.getContent(sopDocument);
  		...
  		
  		List<SopDocument> docs = doc.findAllByContentId(contentRepo.findKeyword("interesting"));
  		...
  		
  	}
  }
  ----
  <1> Spring Content will update the `@ContentId` and `@ContentLength` fields
  ====
  