Symmetry-class: Class of Symmetries
Description
Class of symmetries of various objects.Objects from the Class
A virtual Class: No objects may be created from it.Slots
    - type
- Object of class "character":
      discribes type of symmetry.
- SymmCenter
- Object of class "ANY":
      center of symmetry.
Methods
    - type
- signature(object = "Symmetry"): 
      accessor function for slot- type
- SymmCenter
- signature(object = "Symmetry"): 
      accessor function for slot- SymmCenter
- show
- signature(object = "Symmetry")