*/
    @Nonnull
    Optional<Source> locate(@Nonnull Path dir);

    /**
     * Parse the model obtained previously by a previous call to {@link #locate(Path)}.
     *
     * @param source the source to parse, never {@code null}
     * @param options possible parsing options, may be {@code null}
     * @return the parsed {@link Model}, never {@code null}

     *
     * @param map The source map
     * @param key The key to look up
     * @return The Long value, or null if the key doesn't exist or value is null
     * @throws NumberFormatException if the value cannot be parsed as a Long
     */
    public static Long getLong(final Map<String, Object> map, final String key) {
        return getLong(map, key, null);
    }

    /**
     * Gets a Long value from the map with a default value.

        MIEName expected = new MIEName(testOid(), name);
        assertEquals(expected, parsed, "Parsed object should equal expected");
        assertEquals(name, parsed.toString(), "toString should return the name");
        assertEquals(testOid().hashCode(), parsed.hashCode(), "hashCode should derive from OID");
    }

    @Test
    @DisplayName("Parses empty name length (NAME_LEN=0) as empty string")
    void parseEmptyName() {

            final SAXParser parser = factory.newSAXParser();
            parser.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, StringUtil.EMPTY);
            parser.setProperty(XMLConstants.ACCESS_EXTERNAL_SCHEMA, StringUtil.EMPTY);
            parser.parse(is, this);
        } catch (final Exception e) {
            throw new GsaConfigException("Failed to parse XML file.", e);
        }
    }

    /**

        String escaped;
        String[] parsed;

        // Text with comma gets quoted, but parse preserves quotes
        input = "with,comma";
        escaped = KuromojiCSVUtil.quoteEscape(input); // "with,comma"
        parsed = KuromojiCSVUtil.parse(escaped);
        assertEquals(1, parsed.length);
        assertEquals("\"" + input + "\"", parsed[0]); // Quotes are preserved

        return OptionalThing.empty();
    }

    /**
     * Configuration class that holds parsed configuration values for a field.
     * This class parses pipe-separated configuration values and provides methods
     * to check for specific configuration options.
     */
    public static class Config {

        /**
         * Array of parsed configuration values split by pipe character and trimmed.
         */

        byte[] bytes = token.toByteArray();
        NegTokenTarg parsed = new NegTokenTarg(bytes);

        assertEquals(NegTokenTarg.ACCEPT_INCOMPLETE, parsed.getResult(), "result should be present");
        assertNull(parsed.getMechanism(), "mechanism should be null when omitted");
        assertNull(parsed.getMechanismToken(), "mechanism token should be null when omitted");
        assertNull(parsed.getMechanismListMIC(), "MIC should be null when omitted");
    }

     * @return The deserialized metadata, never {@code null}.
     * @throws IOException If the metadata could not be deserialized.
     * @throws MetadataParseException If the input format could not be parsed.
     */
    Metadata read(File input, Map<String, ?> options) throws IOException, MetadataParseException;

    /**

     * @return The deserialized settings, never {@code null}.
     * @throws IOException If the settings could not be deserialized.
     * @throws SettingsParseException If the input format could not be parsed.
     */
    Settings read(File input, Map<String, ?> options) throws IOException, SettingsParseException;

    /**

     * @return The deserialized toolchains, never {@code null}.
     * @throws IOException If the toolchains could not be deserialized.
     * @throws ToolchainsParseException If the input format could not be parsed.
     */
    PersistedToolchains read(File input, Map<String, ?> options) throws IOException, ToolchainsParseException;

    /**