Added new files missing from the previous commit.

xs/src/slic3r/GUI/TabIface.cpp

@@ -0,0 +1,9 @@
+#include "TabIface.hpp"
+#include "Tab.h"
+
+namespace Slic3r {
+
+void TabIface::load_current_preset() { m_tab->load_current_preset(); }
+void TabIface::rebuild_page_tree() { m_tab->rebuild_page_tree(); }
+
+}; // namespace Slic3r

xs/src/slic3r/GUI/TabIface.hpp

@@ -0,0 +1,18 @@
+namespace Slic3r {
+
+namespace GUI {
+	class Tab;
+};
+
+class TabIface {
+public:
+	TabIface() : m_tab(nullptr) {}
+	TabIface(GUI::Tab *tab) : m_tab(tab) {}
+//	TabIface(const TabIface &rhs) : m_tab(rhs.m_tab) {}
+    void        load_current_preset();
+    void        rebuild_page_tree();
+protected:
+	GUI::Tab   *m_tab;
+};
+
+}; // namespace Slic3r

xs/xsp/GUI_Tab.xsp

@@ -0,0 +1,13 @@
+%module{Slic3r::XS};
+
+%{
+#include <xsinit.h>
+#include "slic3r/GUI/TabIface.hpp"
+%}
+
+%name{Slic3r::GUI::Tab2} class TabIface {
+    TabIface();
+    ~TabIface();
+    void        load_current_preset();
+    void        rebuild_page_tree();
+};