<?xml version="1.0"?>
<search string="Search">
                <field name="name" string="Category Name" filter_domain="[('name','ilike',self)]"/>
                <group expand="0" string="Group by...">
                    <filter string="Responsible" name="responsible" domain="[]" context="{'group_by' : 'technician_user_id'}"/>
                </group>
            </search>
        