Associates a new value with key under group_name.
If key cannot be found then it is created. If group_name cannot be found then it is created. To set an UTF-8 string which may contain characters that need escaping (such as newlines or spaces), use KeyFile.setString.
a group name
a key
a string
2.6
Associates a new value with key under group_name.
If key cannot be found then it is created. If group_name cannot be found then it is created. To set an UTF-8 string which may contain characters that need escaping (such as newlines or spaces), use KeyFile.setString.