vim getting the current value of vim foldmarker

How do you find the value of vim variables that are set with one word commands such as :set foldmarker={,} I'm writing a simple custom function for foldtext() to set a custom one line summary of the folded region it works great but looks funny when I open a documents with any fold marker other than what I've hard coded into the function here is the function ``` set foldtext=GetCustomFoldText() function GetCustomFoldText() let foldClose = '}' let foldTtl = v:foldend - v:foldstart return getline(v:foldstart) . ' (+) ' . foldTtl . ' lines... ' . foldClose endfunction ``` which makes this: ``` function myAwsomeFunction() { // awsomeness here // awsomeness here // awsomeness here } ``` folded becomes this: ``` function myAwsomeFunction() { (+) 5 lines... } ``` Which is great until I edit a document with a different foldmarker I'm trying to determine foldClose dynamically from the foldmarker