<?xml version="1.0"?>
<graph string="Timesheets" sample="1" js_class="hr_timesheet_graphview">
                    <field name="task_id"/>
                    <field name="project_id"/>
                    <field name="unit_amount" string="Time Spent" type="measure" widget="timesheet_uom"/>
                    <field name="amount" string="Timesheet Costs"/>
                </graph>
            