code: function disposeInstance(container, workPromise, renderCompletePromise) {
                  var bindings = _ElementUtilities.data(container).bindTokens;
                  if (bindings) {
                      bindings.forEach(function (binding) {
                          if (binding && binding.cancel) {
                              binding.cancel();
                          }
                      });
                  }
                  if (workPromise) {
                      workPromise.cancel();
                  }
                  if (renderCompletePromise) {
                      renderCompletePromise.cancel();
                  }
              }
docs: Runtime helper functions