code: private Set<String> getConstraintNameList(){
  		Set<String> result = new HashSet<>();
  		String propertyValue = getProperty(ConstraintContextProperty.ALL_CONSTRAINTS);
  		if(propertyValue == null)
  			return result;
  		StringTokenizer attributeTokens = StringUtils.splitArrayString(propertyValue, String.valueOf(ArrayUtils.VALUE_SEPARATION));
  		while(attributeTokens.hasMoreTokens()){
  			String nextToken = attributeTokens.nextToken();
  			result.add(nextToken);
  		}
  		return result;
  	}
docs: Returns all property names for routing constraints, <br>
  i.e. the value of the context property CONSTRAINTS.
  @return A set of all used property names for routing constraints.