/**
     * Get the value of property as {@link String}.
     * @param propertyKey The key of the property. (NotNull)
     * @return The value of found property. (NotNull: if not found, exception)
     * @throws ConfigPropertyNotFoundException When the property is not found.
     */
    String get(String propertyKey);

    /**
     * Is the property true?

        if (StringUtil.isNotBlank(proxyHost) && StringUtil.isNotBlank(proxyPort)) {
            factoryParamMap.put(HcHttpClient.PROXY_HOST_PROPERTY, proxyHost);
            factoryParamMap.put(HcHttpClient.PROXY_PORT_PROPERTY, proxyPort);
            final String proxyUsername = paramMap.get(CRAWLER_WEB_PREFIX + "proxyUsername");

    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property
    //                                       ---------------

    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property
    //                                       ---------------

        for (final WebAuthentication webAuth : webAuthList) {
            basicAuthList.add(webAuth.getAuthentication());
        }
        paramMap.put(HcHttpClient.BASIC_AUTHENTICATIONS_PROPERTY, basicAuthList.toArray(new Authentication[basicAuthList.size()]));

        // request header
        final List<RequestHeader> requestHeaderList = requestHeaderService.getRequestHeaderList(getId());

    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property
    //                                       ---------------

    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property
    //                                       ---------------

    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property
    //                                       ---------------

        FunCustodial.checkSpecifiedProperty(this, propertyName, __specifiedProperties);
    }

    protected void registerSpecifiedProperty(String propertyName) { // basically called by modified property registration
        if (__specifiedProperties != null) { // normally false, true if e.g. setting after selected
            __specifiedProperties.addPropertyName(propertyName);
        }
    }

						<ant antfile="${basedir}/module.xml" target="install.modules">
							<property name="with.fess" value="true" />
							<property name="opensearch.version" value="${opensearch.version}" />
						</ant>
						<ant antfile="${basedir}/plugin.xml" target="install.plugins">
							<property name="with.fess" value="true" />
						</ant>
						<ant antfile="deps.xml" target="install.jars" />