.addValue(Arrays.asList("C"))
            .addValue(Arrays.asList())
            .add(SHORT_NAME, Collections.singletonMap("k1", "v1"))
            .add(LONG_NAME, Collections.singletonMap("k2", "v2"))
            .addValue(Collections.singletonMap("k3", "v3"))
            .addValue(Collections.emptyMap())
            .addValue(null)
            .add(SHORT_NAME, Optional.of("1"))

        final String k = "q";
        assertEquals("", getAsQuery(Collections.singletonMap(k, new String[] { "" })));
        assertEquals("aaa", getAsQuery(Collections.singletonMap(k, new String[] { "aaa" })));
        assertEquals("aaa bbb", getAsQuery(Collections.singletonMap(k, new String[] { "aaa bbb" })));
        assertEquals("aaa bbb ccc", getAsQuery(Collections.singletonMap(k, new String[] { "aaa bbb", "ccc" })));

            .addValue(Arrays.asList("C"))
            .addValue(Arrays.asList())
            .add(SHORT_NAME, Collections.singletonMap("k1", "v1"))
            .add(LONG_NAME, Collections.singletonMap("k2", "v2"))
            .addValue(Collections.singletonMap("k3", "v3"))
            .addValue(Collections.emptyMap())
            .addValue(null)
            .add(SHORT_NAME, java.util.Optional.of("1"))

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3

import java.nio.charset.Charset
import java.util.Collections.singletonMap
import java.util.Collections.unmodifiableMap
import java.util.Locale.US
import kotlin.text.Charsets.ISO_8859_1
import okhttp3.internal.commonEquals
import okhttp3.internal.commonHashCode

  SingletonImmutableBiMap(K key, V value) {
    super(Collections.singletonMap(checkNotNull(key), checkNotNull(value)));
    this.singleKey = key;
    this.singleValue = value;
  }

  private SingletonImmutableBiMap(K key, V value, SingletonImmutableBiMap<V, K> inverse) {
    super(Collections.singletonMap(checkNotNull(key), checkNotNull(value)));
    this.singleKey = key;
    this.singleValue = value;

  }

  public void testCopyOf_map_nulls() {
    Map<Class<? extends Number>, Number> nullKey = Collections.singletonMap(null, (Number) 1.0);
    assertThrows(NullPointerException.class, () -> ImmutableClassToInstanceMap.copyOf(nullKey));

    Map<? extends Class<? extends Number>, Number> nullValue =
        Collections.singletonMap(Number.class, null);
    assertThrows(NullPointerException.class, () -> ImmutableClassToInstanceMap.copyOf(nullValue));

        ToolchainModel model = new ToolchainModel();
        model.setType("TYPE");
        DefaultToolchain toolchain = newDefaultToolchain(model);

        assertFalse(toolchain.matchesRequirements(Collections.singletonMap("name", "John Doe")));
        verify(logger).debug("Toolchain {} is missing required property: {}", toolchain, "name");
    }

    @Test
    void testNonMatchingRequirementProperty() {

    public InputLocation(InputSource source) {
        this.lineNumber = -1;
        this.columnNumber = -1;
        this.source = source;
        this.locations = Collections.singletonMap(0, this);
    }

    public InputLocation(int lineNumber, int columnNumber) {
        this(lineNumber, columnNumber, null, null);
    }

                    try (InputStream in = Files.newInputStream(file)) {
                        name = getModuleName(in);
                    }
                }
                descriptors = Collections.singletonMap(file, name);
                isModuleHierarchy = false;
                return;
            }
            /*

    public InputLocation(InputSource source) {
        this.lineNumber = -1;
        this.columnNumber = -1;
        this.source = source;
        this.locations = Collections.singletonMap(0, this);
    }

    public InputLocation(int lineNumber, int columnNumber) {
        this(lineNumber, columnNumber, null, null);
    }