private static final class DoubleConverter extends Converter<String, Double>
      implements Serializable {
    static final Converter<String, Double> INSTANCE = new DoubleConverter();

    @Override
    protected Double doForward(String value) {
      return Double.valueOf(value);
    }

    @Override
    protected String doBackward(Double value) {
      return value.toString();
    }

    @Override

    return parseUnsignedInt(s, 10);
  }

  /**
   * Returns the unsigned {@code int} value represented by a string with the given radix.
   *
   * <p><b>Java 8+ users:</b> use {@link Integer#parseUnsignedInt(String, int)} instead.
   *
   * @param string the string containing the unsigned integer representation to be parsed.
   * @param radix the radix to use while parsing {@code s}; must be between {@link

     * @return the complete URL string
     */
    public static String buildUrl(final String protocol, final String host, final int port, final String path) {
        if (protocol == null || host == null) {
            return null;
        }
        final String formattedHost = formatForUrl(host);
        final StringBuilder url = new StringBuilder();
        url.append(protocol).append("://").append(formattedHost);

    }

    /**
     * Returns a string representation of this DocList including metrics and content.
     *
     * @return a string representation including content size, processing time, and elements
     */
    @Override
    public String toString() {
        return "DocList [contentSize=" + contentSize + ", processingTime=" + processingTime + ", elementData="
                + Arrays.toString(toArray(new Map[size()])) + "]";
    }

    public Slf4jMavenTransferListener(Logger out) {
        this.out = out;
    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String action = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";
        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();

            }
        }
    }
}


class CapabilitySpec {
    lateinit var name: String

    private
    lateinit var providedBy: Set<String>

    private
    lateinit var selected: String

    private
    var upgrade: String? = null

    internal
    fun configure(components: ComponentMetadataHandler, configurations: ConfigurationContainer) {

    // ---------------------------------------------------------------------
    @Override
    public String toString() {
        return "[" + (md == null ? "no metadata" : md.toString()) + "]";
    }

    // ---------------------------------------------------------------------
    private static int compareStrings(String s1, String s2) {
        if (s1 == null && s2 == null) {
            return 0;
        }

    /**
     * Verify that {@link #toString()} with no root cause equals the default
     * {@code IOException#toString()}.
     */
    @Test
    @DisplayName("toString without root cause matches IOException#toString")
    void testToStringWithoutRootCause() {
        SmbException ex = new SmbException(0, false);
        assertEquals("jcifs.smb1.smb1.SmbException: NT_STATUS_SUCCESS", ex.toString());
    }

        return path.toString();
    }

    @Override
    public String pathOfRemoteRepositoryMetadata(ArtifactMetadata metadata) {
        return pathOfRepositoryMetadata(metadata.getRemoteFilename());
    }

    @Override
    public String toString() {
        return getId();
    }

		}
	}
}

func TestContains(t *testing.T) {
	containsTests := []struct {
		name  string
		elems []string
		elem  string
		out   bool
	}{
		{"exists", []string{"1", "2", "3"}, "1", true},
		{"not exists", []string{"1", "2", "3"}, "4", false},
	}
	for _, test := range containsTests {
		t.Run(test.name, func(t *testing.T) {
			if out := Contains(test.elems, test.elem); test.out != out {