Sets the current header of the row.
This is only allowed to be called from a gtk.types.ListBoxUpdateHeaderFunc. It will replace any existing header in the row, and be shown in front of the row in the listbox.
the header
Sets the current header of the row.
This is only allowed to be called from a gtk.types.ListBoxUpdateHeaderFunc. It will replace any existing header in the row, and be shown in front of the row in the listbox.