add third party: yoga 1.18.0

doric-Qt/doric/yoga/internal/experiments.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include <cstddef>
+
+namespace facebook {
+namespace yoga {
+namespace internal {
+
+enum struct Experiment : size_t {
+  kDoubleMeasureCallbacks,
+};
+
+void enable(Experiment);
+void disable(Experiment);
+bool toggle(Experiment);
+
+} // namespace internal
+} // namespace yoga
+} // namespace facebook