Peeks at the value that is at the given index for the given tag in the given
list.
The resulting string in @value will be in UTF-8 encoding and doesn't need
to be freed by the caller. The returned string is also guaranteed to
be non-%NULL and non-empty.
Peeks at the value that is at the given index for the given tag in the given list.
The resulting string in @value will be in UTF-8 encoding and doesn't need to be freed by the caller. The returned string is also guaranteed to be non-%NULL and non-empty.