liborigin 2.0.0

### - l -

- label : Origin::GraphAxisFormat, Origin::Window
- labelGap : Origin::ColorScale
- labelsColor : Origin::ColorScale
- labelVisible : Origin::ColorMapLevel
- last_child : tree_node_< T >
- layers : Origin::Graph
- left : Origin::Rect
- legend : Origin::GraphLayer
- levels : Origin::ColorMap
- lineColor : Origin::ColorMapLevel, Origin::GraphCurve, Origin::SurfaceProperties::SurfaceColoration
- lineConnect : Origin::GraphCurve
- lines : Origin::GraphLayer
- lineStyle : Origin::ColorMapLevel, Origin::GraphCurve
- lineVisible : Origin::ColorMapLevel
- lineWidth : Origin::ColorMapLevel, Origin::GraphCurve, Origin::SurfaceProperties::SurfaceColoration
- log10 : Origin::GraphAxisBreak
- logfile : Origin750Parser
- loose : Origin::Excel, Origin::SpreadSheet