return nil
	}

	// Report differences in environment variables.
	var missing []string
	var mismatching []string
	for k, v := range s1.MinioEnv {
		ev, ok := s2.MinioEnv[k]
		if !ok {
			missing = append(missing, k)
		} else if v != ev {
			mismatching = append(mismatching, k)
		}
	}
	var extra []string
	for k := range s2.MinioEnv {
		_, ok := s1.MinioEnv[k]
		if !ok {

	// TODO(quasilyte): improve error message (#21860).
	V4FMADDPS (AX), [Z4-Z0], K1, Z7  // ERROR "invalid instruction"
	V4FMADDPS (AX), [Z1-Z0], K1, Z7  // ERROR "invalid instruction"
	// Mismatching registers in a range.
	// TODO(quasilyte): improve error message (#21860).
	V4FMADDPS (AX), [AX-Z3], K1, Z7  // ERROR "invalid instruction"
	V4FMADDPS (AX), [Z0-AX], K1, Z7  // ERROR "invalid instruction"

          protected Queue<Event> initialValue() {
            return Queues.newArrayDeque();
          }
        };

    /** Per-thread dispatch state, used to avoid reentrant event dispatching. */
    private final ThreadLocal<Boolean> dispatching =
        new ThreadLocal<Boolean>() {
          @Override
          protected Boolean initialValue() {
            return false;
          }
        };

    @Override

import java.lang.reflect.Method;
import java.util.concurrent.Executor;
import javax.annotation.CheckForNull;

/**
 * A subscriber method on a specific object, plus the executor that should be used for dispatching
 * events to it.
 *
 * <p>Two subscribers are equivalent when they refer to the same method on the same object (not
 * class). This property is used to ensure that no subscriber method is registered more than once.
 *

    }
  }
};
}  // namespace internal

using TracingOperationPtr =
    std::unique_ptr<TracingOperation, internal::TracingOperationDeleter>;

// This holds the context for the execution: dispatching operations either to an
// MLIR implementation or to a graph implementation.
class TracingContext : public AbstractContext {
 protected:
  explicit TracingContext(AbstractContextKind kind) : AbstractContext(kind) {}

 *
 * <p>Listeners are registered once via {@link #addListener} and then may be invoked by {@linkplain
 * #enqueue enqueueing} and then {@linkplain #dispatch dispatching} events.
 *
 * <p>The API of this class is designed to make it easy to achieve the following properties
 *
 * <ul>
 *   <li>Multiple events for the same listener are never dispatched concurrently.