How to minimize gap between Tab icon and Tab text in Codename one?

I am writing an App with Codename One, but I cannot find out how to make the gap between a tab icon and a tab text smaller.

It looks like this:

but it should look like this: (With the icons of the first picture though)

How can I minimize the gap between

Icon -> text

and

Icon -> content

?

That gap seems to be delivered from the icon itself and not from us. Assuming you used the material design icons make sure to set the padding to 0 e.g.

FontImage.setDefaultPadding(0);

Or:

FontImage i = ...;
i.setPadding(0);

E.g:

Form hi = new Form("Tabs", new BorderLayout());
Tabs t = new Tabs();
FontImage fim = FontImage.createMaterial(FontImage.MATERIAL_3D_ROTATION, "Tab", 4);
fim.setPadding(0);
t.addTab("AAA", fim, new Label("Tab 1"));
t.addTab("BBB", fim, new Label("Tab 2"));
hi.add(BorderLayout.CENTER, t);

hi.show();