variety -- get the variety

Ways to use variety:

• variety(CoherentSheaf) -- get the variety
• variety(Ideal) -- the closed projective subvariety defined by an ideal
• variety(Ring) -- the variety previously associated to a given ring
• variety(SheafMap) (missing documentation)
• variety(SheafOfRings) -- get the variety
• variety(SumOfTwists) (missing documentation)

For the programmer

The object variety is a method function.