code: public CMAEntry unPublish(CMAEntry entry) {
      assertNotNull(entry, "entry");
      final String entryId = getResourceIdOrThrow(entry, "entry");
      final String spaceId = getSpaceIdOrThrow(entry, "entry");
      final String environmentId = entry.getEnvironmentId();
  
      return service.unPublish(spaceId, environmentId, entryId).blockingFirst();
    }
docs: Un-Publish an Entry.
  
  @param entry Entry
  @return {@link CMAEntry} result instance
  @throws IllegalArgumentException if entry is null.
  @throws IllegalArgumentException if entry's id is null.
  @throws IllegalArgumentException if entry's space id is null.