* implementation type.
     *
     * <p>This method is provided as a convenience for tests. Otherwise they'd need to be
     * knowledgeable about all the implementation details of our type system trickery.
     */
    abstract E castForTesting(InternalEntry<K, V, ?> entry);

    /** Unsafely extracts the key reference queue used by this segment. */
    ReferenceQueue<K> getKeyReferenceQueueForTesting() {

                                     func::FuncOp func) {
  // Examine all StatefulPartitionedCall ops that have resources as return
  // types. If the returned resource traces back to an input argument for the
  // SPC, then replace uses of the returned copy with the original input.
  //
  // Note: This does not descend through nested SCPs.
  auto ComesFromBlockArgNumber = [](Value val) -> int {

// is 1. If the value is -1 the tests are repeating forever.
GTEST_DECLARE_int32_(repeat);

// This flag controls whether Google Test includes Google Test internal
// stack frames in failure stack traces.
GTEST_DECLARE_bool_(show_internal_stack_frames);

// When this flag is specified, tests' order is randomized on every iteration.
GTEST_DECLARE_bool_(shuffle);

		// Validate the outgoing headers.
		if err := validateHeaders(req.Header); err != "" {
			req.closeBody()
			return nil, fmt.Errorf("net/http: invalid header %s", err)
		}

		// Validate the outgoing trailers too.
		if err := validateHeaders(req.Trailer); err != "" {
			req.closeBody()
			return nil, fmt.Errorf("net/http: invalid trailer %s", err)
		}
	}

	origReq := req
	req = setupRewindBody(req)