newRelation = ColumnRelation(jsonParam['leftColumn']['fullName'],jsonParam['leftColumn']['transformation'],jsonParam['rightColumn']['fullName'],jsonParam['rightColumn']['transformation'])
if(not Document.Data.ColumnRelations.Contains(newRelation)):
    Document.Data.ColumnRelations.Add(newRelation)
else:
	Document.Data.ColumnRelations.Remove(newRelation)
	Document.Data.ColumnRelations.Add(newRelation)