$//$ This class def should be placed in the private section of Playlist

$//$ at an "appropriate" location. $($What might be an inappropriate location?$)$

class Node $\{$

private:

Song$\_$Entry $\_$song;

Node $*\_$next;

public:

Node$($const Song$\_$Entry& song $=$ Song$\_$Entry$())$ : $\_$song$($song$),\_$next$($nullptr$)\{\}$

~Node$()$; $//$ Do not do recursive free

Song$\_$Entry& get$\_$song$()\{$ return $\_$song; $\}$

Node $*$get$\_$next$()\{$ return $\_$next; $\}$

Node $*$insert$\_$next$($Node $*$p$)$;

Node $*$remove$\_$next$()$;

friend class Tests; $//$ Don't remove this line

$\}$;