code: def deleteVertex(self, document, waitForSync = False) :
          
          url = "%s/vertex/%s" % (self.URL, document._id)
  
          r = self.connection.session.delete(url, params = {'waitForSync' : waitForSync})
          data = r.json()
          if r.status_code == 200 or r.status_code == 202 :
              return True
  
          raise DeletionError("Unable to delete vertice, %s" % document._id, data)
docs: deletes a vertex from the graph as well as al linked edges