<?xml version="1.0"?>
<search string="Clicks">
                    <field name="link_id"/>
                    <field name="country_id"/>
                    <group expand="0" string="Group By">
                        <filter string="Link" name="groupby_link_id" domain="[]" context="{'group_by': 'link_id'}"/>
                        <filter string="Country" name="groupby_country_id" context="{'group_by': 'country_id'}"/>
                    </group>
                </search>
            