@SuppressWarnings("rawtypes")
	@Override
	public List<Class> getFieldTypes() {
		ArrayList<Class> types = new ArrayList<>(values.size());
		for (Object val : values) {
			types.add(val.getClass());
		}
		return Collections.unmodifiableList(types);
	}
Return the values for all the fields in this tuple
@return an unmodifiable List list of values.
spring-xd-tuple/src/main/java/org/springframework/xd/tuple/DefaultTuple.java