ENH: Add Concept checking for 2D Visualization

Change-Id: I184b716741f9b88fe7b3e4cb0cd30bcda97299e8
STYLE: Fix include guard in level set visualization.

Change-Id: I6576c4b50aba6cef0806fa0abe075d417cf351eb
Merge topic 'LevelSetStyle'

362d450 STYLE: Fix include guard in level set visualization.
Merge topic 'FixVisuLevelSet3D'

4630ab8 ENH: Add Concept checking for 2D Visualization