code: func GxAngles(value GxAngle) *SimpleElement {
  	return &SimpleElement{
  		StartElement: xml.StartElement{
  			Name: xml.Name{Local: "gx:angles"},
  		},
  		value: strconv.FormatFloat(value.Heading, 'f', -1, 64) + " " +
  			strconv.FormatFloat(value.Tilt, 'f', -1, 64) + " " +
  			strconv.FormatFloat(value.Roll, 'f', -1, 64),
  	}
  }
docs: // GxAngles returns a new gx:Angles element.