void mv_pop_range (struct missing_values *, double *low, double *high);
void mv_peek_range (const struct missing_values *, double *low, double *high);
-bool mv_is_resizable (struct missing_values *, int width);
+bool mv_is_resizable (const struct missing_values *, int width);
void mv_resize (struct missing_values *, int width);
typedef bool mv_is_missing_func (const struct missing_values *,