The API docs use **Swagger UI** and **ReDoc**, and each of those need some JavaScript and CSS files.

By default, those files are served from a <abbr title="Content Delivery Network: A service, normally composed of several servers, that provides static files, like JavaScript and CSS. It's commonly used to serve those files from the server closer to the client, improving performance.">CDN</abbr>.

    /**
     * Gets the login credential for SSO authentication.
     * @return The login credential.
     */
    LoginCredential getLoginCredential();

    /**
     * Resolves credential using the provided resolver.
     * @param resolver The login credential resolver.
     */
    void resolveCredential(LoginCredentialResolver resolver);

    /**
     * Gets the action response for the specified SSO response type.

You can use any template engine you want with **FastAPI**.

A common choice is Jinja2, the same one used by Flask and other tools.

There are utilities to configure it easily that you can use directly in your **FastAPI** application (provided by Starlette).

## Install dependencies { #install-dependencies }

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and install `jinja2`:

        assertEquals(mockCredentials, wrapper.getCredentials(), "Initial credentials should be set by constructor");
    }

    @Test
    @DisplayName("Should return the credentials provided in the constructor")
    void testGetCredentials() {
        assertEquals(mockCredentials, wrapper.getCredentials(), "getCredentials should return the initially set credentials");
    }

    @Test

     .col#{$infix}-#{$i} {\n          @extend %grid-column;\n        }\n      }\n    }\n\n    .col#{$infix},\n    .col#{$infix}-auto {\n      @extend %grid-column;\n    }\n\n    @include media-breakpoint-up($breakpoint, $breakpoints) {\n      // Provide basic `.col-{bp}` classes for equal-width flexbox columns\n      .col#{$infix} {\n        flex-basis: 0;\n        flex-grow: 1;\n        max-width: 100%;\n      }\n\n      @if $grid-row-columns > 0 {\n        @for $i from 1 through $grid-row-columns...

import javax.xml.xpath.XPathFactory;
import javax.xml.xpath.XPathNodes;

import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.w3c.dom.Node;

/**
 * The XPathAPI class provides methods to evaluate XPath expressions and select nodes or node lists from an XML document.
 * It uses the javax.xml.xpath.XPath and javax.xml.xpath.XPathFactory classes to create and evaluate XPath expressions.
 *

import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.optional.OptionalEntity;

/**
 * Character mapping file handler for managing character mapping dictionaries.
 * This class provides functionality to load, parse, and manage character mapping
 * rules that define how input characters should be transformed to output characters
 * during text analysis and search processing.
 *

import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing request headers used in web crawling configurations.
 * This service provides CRUD operations for request headers that are applied
 * during web crawling to configure HTTP request behavior.
 *
 */
public class RequestHeaderService {

    /**

        this.httpClientContext = httpClientContext;
    }

    /**
     * Sets the authentication scheme provider map.
     *
     * @param authSchemeProviderMap The authentication scheme provider map
     */
    public void setAuthSchemeProviderMap(final Map<String, AuthSchemeProvider> authSchemeProviderMap) {
        this.authSchemeProviderMap = authSchemeProviderMap;

 *
 * <p>A graph is composed of a set of nodes and a set of edges connecting pairs of nodes.
 *
 * <p>There are three primary interfaces provided to represent graphs. In order of increasing
 * complexity they are: {@link Graph}, {@link ValueGraph}, and {@link Network}. You should generally
 * prefer the simplest interface that satisfies your use case. See the <a