Places a comment above key from group_name.
If key is null then comment will be written above group_name. If both key and group_name are null, then comment will be written above the first group in the file.
Note that this function prepends a '#' comment marker to each line of comment.
a group name, or null
a key
a comment
true if the comment was written, false otherwise
Places a comment above key from group_name.
If key is null then comment will be written above group_name. If both key and group_name are null, then comment will be written above the first group in the file.
Note that this function prepends a '#' comment marker to each line of comment.