Atm only `MethodInfo::signature` is using this option, however because MethodParameter-s might be difficult to "print"-out and could be complex, maybe there could be other ways, but using OutWriter seemed the simplest option following do not repeat yourself principle.

The root-cause why we need this SkipComments, because Comments are being fetched and attached to Items way before OutWriter is constructed. However while we writeOut items (for example DomItem "containing" MethodParameter ) the comments are being fetched in the DomItem::writeOutPre -> ow.itemStart
However if itemStart was not called, ow.writeRegion will check stack (unless we use this flag) 

(initially it was introduced as part of the Document symbols feature for Qmlls, again, maybe there are alternative ways preparing these signatures...)

related to QTBUG-123386
QTBUG-128423 could be related as well