IAgVmVOSpatialCalculationLevelCollection Interface for defining collections of defining Spatial Calculation Boundary/Fill Levels for volumetric grid.
  Add | Adds a new level to the collection. When adding a level with duplicate 'Value', it will update 'Color' and 'Translucency' values of the existing level. | 
  RemoveAll | Removes all elements from the collection. | 
  RemoveAt | Removes an element from the collection using specified index. | 
  Count | Returns the number of elements in a collection. | 
  Item | Given an index, returns an element in the collection. | 





