void setThumbnail(const QString &clipId, const QPixmap &pix);
/** @brief Get cached thumbnail for a project's clip or create it if no cache. */
void getCachedThumbnail(ProjectItem *item);
+ void getCachedThumbnail(SubProjectItem *item);
/** @brief The clip is about to be reloaded, cancel thumbnail requests. */
void resetThumbsProducer(DocClipBase *clip);