code: public boolean revokeAllResourcePermissions(String subjectid) {
  		if (!StringUtils.isBlank(subjectid) && getResourcePermissions().containsKey(subjectid)) {
  			getResourcePermissions().remove(subjectid);
  			return true;
  		}
  		return false;
  	}
docs: Revokes all permissions for a subject id.
  @param subjectid subject id
  @return true if successful