Trying to sort through changing the FO so the top level topics in a
ditamap don't start a new page. I don't see anything in the attribute
sets that should be causing it, so I'm thinking top level topics are
their own FO block or something, but I can't tell as I can't seem to
find the FO file. Seems like I used to know how to find this, but I've
lost it.

Any suggestions on how to get topics to not start a new page, or how I
can find the FO so I can sort it out myself?