void draw_annotation_block(std::vector<pv::data::decode::Annotation> a,
QPainter &p, int h, int y, size_t base_colour) const;
void draw_instant(const pv::data::decode::Annotation &a, QPainter &p,
void draw_annotation_block(std::vector<pv::data::decode::Annotation> a,
QPainter &p, int h, int y, size_t base_colour) const;
void draw_instant(const pv::data::decode::Annotation &a, QPainter &p,