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    <object class="org.opensourcephysics.cabrillo.tracker.TToolBar">
        <property name="trace" type="boolean">false</property>
        <property name="position" type="boolean">true</property>
        <property name="velocity" type="boolean">false</property>
        <property name="acceleration" type="boolean">false</property>
        <property name="labels" type="boolean">true</property>
        <property name="multiply_by_mass" type="boolean">false</property>
        <property name="trail_length" type="int">15</property>
        <property name="stretch" type="int">1</property>
    </object>
    </property>
    <property name="track_control_x" type="int">10</property>
    <property name="track_control_y" type="int">114</property>
</object>