Slinger - multipart support

Does any one know if slinger supports the “multipart/mixed or x-mixed-replace” content-type header in cgi scripts?
i.e. will the following send hello1 to the client and then send hello2 to the client 10 seconds later.

Content-type: multipart/x-mixed-replace; boundary=“ThisRandomString”

–ThisRandomString

Content-type: text/html

hello1

–ThisRandomString

#delay for 10 seconds here.

Content-type: text/html

hello2

–ThisRandomString–