import static com.google.common.base.Preconditions.checkPositionIndexes;
import static java.lang.Byte.toUnsignedInt;
import static java.lang.Integer.parseInt;
import static java.security.AccessController.doPrivileged;
import static java.util.Objects.requireNonNull;

import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.annotations.VisibleForTesting;

      try {
        return Unsafe.getUnsafe();
      } catch (SecurityException tryReflectionInstead) {
        // We'll try reflection instead.
      }
      try {
        return AccessController.doPrivileged(
            (PrivilegedExceptionAction<Unsafe>)
                () -> {
                  Class<Unsafe> k = Unsafe.class;
                  for (Field f : k.getDeclaredFields()) {