<field name="progress" widget="progressbar" invisible="context.get('set_visible',False)"/>
<field name="state" invisible="context.get('set_visible',False)"/>
<button name="do_open" states="pending,draft,done,cancelled" string="Start Task" type="object" icon="gtk-media-play" help="For changing to open state" invisible="context.get('set_visible',False)"/>
<field name="progress" widget="progressbar" invisible="context.get('set_visible',False)"/>
<field name="state" invisible="context.get('set_visible',False)"/>
<button name="do_open" states="pending,draft,done,cancelled" string="Start Task" type="object" icon="gtk-media-play" help="For changing to open state" invisible="context.get('set_visible',False)"/>