code: public Map<String, Map<String, List<String>>> revokeResourcePermission(String subjectid, String resourcePath) {
  		if (StringUtils.isBlank(subjectid) || StringUtils.isBlank(resourcePath)) {
  			return Collections.emptyMap();
  		}
  		resourcePath = Utils.urlEncode(resourcePath);
  		return getEntity(invokeDelete(Utils.formatMessage("_permissions/{0}/{1}", subjectid, resourcePath),
  				null), Map.class);
  	}
docs: Revokes a permission for a subject, meaning they no longer will be able to access the given resource.
  @param subjectid subject id (user id)
  @param resourcePath resource path or object type
  @return a map of the permissions for this subject id