How to use the entities.PlaylistSong.fromSong function in entities

protected async onAddedSong(payload: StationTopic.AddPlaylistSongPayLoad) {
    // Filter by stationId
    if (payload.stationId === this.stationId) {
      // Check if the song is already in the list
      if (!this.player.playlist.some(song => song.id === payload.song.id)) {
        this.player.playlist = [...this.player.playlist, PlaylistSong.fromSong(payload.song)];
        if (!this.player.playing) {
          await this.publish(StationTopic.UPDATE_PLAYER_SONG, { song: null });
          setTimeout(this.startPlayer.bind(this), 5000);
        }
      }
    }
  }

downVotes?: string[]
  ): Promise {
    const song = await super.update(
      id,
      songId,
      title,
      url,
      creatorId,
      stationId,
      duration,
      thumbnail,
      isPlayed,
      upVotes,
      downVotes
    );
    return PlaylistSong.fromSong(song);
  }

public async delete(id: string): Promise {
    const song = await super.delete(id);
    return PlaylistSong.fromSong(song);
  }

public async findOne(id?: string): Promise {
    const song = await super.findOne(id);
    return PlaylistSong.fromSong(song);
  }