icon="icons/Sketch/circle_3pt_32x32.png"
title="Three points">
<sketch-2dpoint_selector id="first_point"
+ reference_attribute="first_point_ref"
title="First point"
tooltip="First point"
accept_expressions="0"
enable_value="enable_by_preferences"/>
<sketch-2dpoint_selector id="second_point"
+ reference_attribute="second_point_ref"
title="Second point"
tooltip="Second point"
accept_expressions="0"
enable_value="enable_by_preferences"/>
<sketch-2dpoint_selector id="third_point"
+ reference_attribute="third_point_ref"
title="Third point"
tooltip="Third point"
accept_expressions="0"