src/main/java/org/apache/commons/scxml2/io/SCXMLReader.java (2 lines):
	- line 952: // TODO src attribute for <parallel>
	- line 993: // TODO src attribute for <parallel>


src/main/java/org/apache/commons/scxml2/model/Assign.java (1 line):
	- line 153: // TODO: introduce a optional 'trace.change' setting or something alike to enable .change events,


src/main/java/org/apache/commons/scxml2/io/ModelUpdater.java (1 line):
	- line 297: // TODO: parallel must may have invokes too


src/main/java/org/apache/commons/scxml2/io/SCXMLWriter.java (1 line):
	- line 1161: // TODO StAX API bug means we can't use custom factories yet