message: Document the unified API unit-tests parameterization
diff: @@ -30,6 +30,9 @@ using tensorflow::string;
  namespace tensorflow {
  namespace {
  +// The tests are parameterized on:
  +// - a string representing the tracing implementation: "mlir" or "graphdef".
  +// - a boolean that when true enables TFRT as the execution engine.
  class UnifiedCAPI
  : public ::testing::TestWithParam<std::tuple<const char*, bool>> {
  protected:
  @@ -983,6 +986,10 @@ TEST_P(UnifiedCAPI, TF_ExecutionContextGetTFEContextFromFunctionContextRaises) {
  TF_DeleteExecutionContext(graph_ctx);
  }
  +
  +// The above tests are run for a combination of:
  +// - graphdef and MLIR tracing engine
  +// - Using TFRT as an execution runtime (true == enable TFRT)
  #ifdef PLATFORM_GOOGLE
  INSTANTIATE_TEST_SUITE_P(Tracing, UnifiedCAPI,
  ::testing::Combine(::testing::Values("graphdef",
  