return cached_pure_height_ + pure_relative_y_coordinate (g, start, end);
/* Note: cached_pure_height_ does not notice if start changes, implicitly
assuming that Items' pure_heights do not depend on 'start' or 'end'.
return cached_pure_height_ + pure_relative_y_coordinate (g, start, end);
/* Note: cached_pure_height_ does not notice if start changes, implicitly
assuming that Items' pure_heights do not depend on 'start' or 'end'.