panic("invalid format")
	}

	// Update checksum.
	// This field is special in that it is terminated by a NULL then space.
	var f formatter
	field := b.toV7().chksum()
	chksum, _ := b.computeChecksum() // Possible values are 256..128776
	f.formatOctal(field[:7], chksum) // Never fails since 128776 < 262143
	field[7] = ' '
}

// computeChecksum computes the checksum for the header block.

	SHA1H V17, V25                                              // 390a285e
	SHA1M V0.S4, V27, V27                                       // 7b23005e
	SHA1P V3.S4, V20, V27                                       // 9b12035e
	SHA1SU0 V17.S4, V13.S4, V16.S4                              // b031115e
	SHA1SU1 V24.S4, V23.S4                                      // 171b285e

import com.google.common.base.Function;
import com.google.common.base.Functions;
import java.util.Map;

/**
 * Tests for {@link Maps#transformValues(Map, Function)}.
 *
 * @author Isaac Shum
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public class MapsTransformValuesTest extends AbstractMapsTransformValuesTest {
  @Override
  protected Map<String, String> makeEmptyMap() {

import java.util.concurrent.Callable;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Static utility methods pertaining to the {@link Callable} interface.
 *
 * @author Isaac Shum
 * @since 1.0
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public final class Callables {
  private Callables() {}

import java.util.concurrent.ExecutionException;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Unit tests for {@link Callables}.
 *
 * @author Isaac Shum
 */
@GwtCompatible(emulated = true)
public class CallablesTest extends TestCase {

  @J2ktIncompatible // TODO(b/324550390): Enable
  public void testReturning() throws Exception {

import java.util.Map.Entry;
import java.util.Set;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Superclass for tests for {@link Maps#transformValues} overloads.
 *
 * @author Isaac Shum
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class AbstractMapsTransformValuesTest extends MapInterfaceTest<String, String> {
  public AbstractMapsTransformValuesTest() {

import java.util.Map.Entry;
import java.util.Set;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Superclass for tests for {@link Maps#transformValues} overloads.
 *
 * @author Isaac Shum
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class AbstractMapsTransformValuesTest extends MapInterfaceTest<String, String> {
  public AbstractMapsTransformValuesTest() {

	AESE	V1.D2, V2.D2                                     // ERROR "invalid arrangement"
	AESIMC	V1.S4, V2.S4                                     // ERROR "invalid arrangement"
	SHA1SU1	V1.B16, V2.B16                                   // ERROR "invalid arrangement"
	SHA256SU1	V1.B16, V2.B16, V3.B16                   // ERROR "invalid arrangement"

	SHA256SU0	V8.S4, V7.S4            // 0729285e
	SHA256SU1	V6.S4, V5.S4, V7.S4     // a760065e
	SHA1SU0	V11.S4, V8.S4, V6.S4            // 06310b5e
	SHA1SU1	V5.S4, V1.S4                    // a118285e
	SHA1C	V1.S4, V2, V3                   // 4300015e
	SHA1H	V5, V4                          // a408285e
	SHA1M	V8.S4, V7, V6                   // e620085e
	SHA1P	V11.S4, V10, V9                 // 49110b5e

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