Use guava preconditions
@@ -28,9 +28,9 @@ import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;
import build.bazel.remote.execution.v2.Digest;
-import com.google.api.client.util.Preconditions;
import com.google.auth.Credentials;
import com.google.common.base.Charsets;
+import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.remote.util.DigestUtil;
import com.google.devtools.build.lib.testutil.MoreAsserts.ThrowingRunnable;
