Method ADT.Relation.Binary()->make_symmetric()
- Method
make_symmetric
 this_program(<LeftType|RightType,RightType|LeftType>) make_symmetric()- Description
 Makes the relation symmetric, i.e. makes sure that if xRy is part of the relation set, then yRx should also be a part of the relation set.
- Note
 This operation modifies the current object.