Here document as an argument to bash function

The way to that would be possible is:

printArgs 17 "$(cat <<EOF
18
19
EOF
)"

But why would you want to use a heredoc for this? heredoc is treated as a file in the arguments so you have to (ab)use cat to get the contents of the file, why not just do something like:

print Args 17 "18
19"

Please keep in mind that it is better to make a script on the machine you want to ssh to and run that then trying some hack like this because bash will still expand variables and such in your multiline argument.