>And in it I found AbstractRowData.as which looks exactly like the one on >github for FlexUnit4 that Mike linked to earlier in this thread. I haven't done any forensics on who checked it in and when, but keep in mind that I am assuming that this code base on Adobe svn is the source for FlexUnit1Lib because (and yes, this is a separate topic) we must know the source for every binary in FlexUnit.
Confirmed that AbstractRowData is used inside of the FlexUnit1.lib.