Line comment format in Visual Studio Code - visual-studio-code

Question

Is there a way to remove the space inserted after the line comment character(s), and to start the comment at the start of the line in Visual Studio Code? (thus being able to use the commented-out-code comment style)
Before:
void fn() {
code();
}
After (applying Toggle Line Comment command):
void fn() {
// code();
}
Desired:
void fn() {
// code();
}
I would prefer either a global switch or a per language configuration.
E.g. in Sublime Text 3 you can achieve this by copying the Comments.tmPreferences file from the package of a given language to into the user packages, and changing the value of the TM_COMMENT_START and TM_COMMENT_DISABLE_INDENT settings shell variables. E.g. the original Groovy.sublime-package\Comments.tmPreferences:
<?xml version="1.0" encoding="UTF-8"?>
<plist version="1.0">
<dict>
<key>name</key>
<string>Comments</string>
<key>scope</key>
<string>source.groovy</string>
<key>settings</key>
<dict>
<key>shellVariables</key>
<array>
<dict>
<key>name</key>
<string>TM_COMMENT_START</string>
<key>value</key>
<string>// </string>
</dict>
...
On the other hand in Visual Studio Code in the language-configuration.json file of a given language the comments.lineComment values already lack the extra space, so they are inserted somewhere else. E.g. the original groovy\language-configuration.json:
{
"comments": {
"lineComment": "//",
"blockComment": [ "/*", "*/" ]
},
...