void psppire_axis_append_n (PsppireAxis *a, gint n_units, gint size);
void psppire_axis_resize (PsppireAxis *a, gint posn, glong size);
void psppire_axis_append_n (PsppireAxis *a, gint n_units, gint size);
void psppire_axis_resize (PsppireAxis *a, gint posn, glong size);