code: public ResponseBuilder initialize(final Resource parent, final Resource resource) {
          setResource(DELETED_RESOURCE.equals(resource) || MISSING_RESOURCE.equals(resource) ? null : resource);
  
          // Check the cache
          if (getResource() != null) {
              final Instant modified = getResource().getModified();
              final EntityTag etag;
  
              if (getResource().getBinaryMetadata().isPresent() && !isRdfType(getRequest().getContentType()) ) {
                  etag = new EntityTag(buildEtagHash(getIdentifier() + "BINARY", modified, null));
              } else {
                  etag = new EntityTag(buildEtagHash(getIdentifier(), modified, getRequest().getPrefer()));
              }
              // Check the cache
              checkRequiredPreconditions(preconditionRequired, getRequest().getHeaders().getFirst(IF_MATCH),
                      getRequest().getHeaders().getFirst(IF_UNMODIFIED_SINCE));
              checkCache(modified, etag);
          }
  
          // One cannot put binaries into the ACL graph
          if (ACL.equals(getRequest().getExt()) && rdfSyntax == null) {
              throw new NotAcceptableException();
          }
  
          // For operations that modify resources, the parent resource may need to be updated via
          // ResourceService::touch. This allows us to keep a reference to the parent resource
          // since it has already been looked up. However, access to the parent resource is not necessary
          // if, in the case of creation/deletion, PUT operations are configured as 'uncontained' (the default)
          // or, in the case of updates, the resource has no parent container.
          // Here, the `resource` object is used directly rather than doing a null check on `getResource()` since
          // in this case, they amount to the same thing.
          if (!createUncontained || resource.getContainer().isPresent()) {
              setParent(parent);
          }
          return status(NO_CONTENT);
      }
docs: Initialize the response handler.
  @param parent the parent resource
  @param resource the resource
  @return the response builder