<group-time>
<part-group number="1" type="start">
<group-symbol default-x="-10">square</group-symbol>
<group-barline>yes</group-barline>
<group-time/>
</part-group>
<part-group number="1" type="start">
<group-symbol default-x="-10">square</group-symbol>
<group-barline>yes</group-barline>
<group-time/>
</part-group>