For example, as you can see in the keymap preferences, there are operators that have properties, like this Smooth Vertices:
With this little code
row.operator("mesh.vertices_smooth") I can make a button to execute this operator in my UI panel
So how can I do the same with those properties and checkboxes, for them to show up in my custom panel, so then I can set some settings before clicking the button?
This is in blender 2.8 by the way..