[TYPO3] Is there something like insertData in postUserFunc?

[Benjamin Harwell]

Creating a subject that relates to what you are trying to do is always
difficult.. The small code snippet below is from a TMENU I'm working on. I
need to replace the "field:uid" with the uid of the subpage currently being
processed. My question is, how in the world do you get that to substitute?

NO {
  doNotShowLink = 1
  before.cObject = COA
  before.cObject {
     1 = TEXT
     1.postUserFunc = user_doStuff->getContentFlexValue
     1.postUserFunc{
        uid = field:uid
     }
  }
}

Thanks for any help.

-Ben