ListItem constructor
ListItem()
Implementation
ListItem(this.rank, this.id, this.listedAt, this.notes, this.type, this.movie, this.show, this.season, this.episode,
this.person);
ListItem(this.rank, this.id, this.listedAt, this.notes, this.type, this.movie, this.show, this.season, this.episode,
this.person);