return result;
    }

    default ModelSource resolveModel(Dependency dependency, AtomicReference<Dependency> modified)
            throws UnresolvableModelException {
        org.apache.maven.model.Dependency d = new org.apache.maven.model.Dependency(dependency);
        ModelSource result = resolveModel(d);
        if (d.getDelegate() != dependency) {
            modified.set(d.getDelegate());
        }

    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-xml</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-xml</artifactId>
    </dependency>

    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-api</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>

         * aftereffects and bogus error messages.
         */
        List<Dependency> dependencies = model.getDependencies();
        Map<String, Dependency> normalized = new LinkedHashMap<>(dependencies.size() * 2);

        for (Dependency dependency : dependencies) {
            normalized.put(dependency.getManagementKey(), dependency);
        }

        if (dependencies.size() != normalized.size()) {

  <dependencyManagement>

    <dependencies>

      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t04-a</artifactId>
        <version>1.0</version>
      </dependency>

      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t04-b</artifactId>
        <version>1.0</version>
      </dependency>

    <dependency>
      <groupId>maven-test</groupId>

      <artifactId>jsr305</artifactId>
    </dependency>
    <dependency>
      <groupId>org.checkerframework</groupId>
      <artifactId>checker-qual</artifactId>
    </dependency>
    <dependency>
      <groupId>com.google.errorprone</groupId>
      <artifactId>error_prone_annotations</artifactId>
    </dependency>
    <dependency>
      <groupId>com.google.j2objc</groupId>
      <artifactId>j2objc-annotations</artifactId>

    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t08-a</artifactId>
      <version>1.0</version>
    </dependency>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t08-c</artifactId>
      <version>1.0</version>
    </dependency>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t08-d</artifactId>
      <version>1.0</version>
    </dependency>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>test</groupId>
                <artifactId>other</artifactId>
                <version>0.1-SNAPSHOT</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.junit</groupId>
                <artifactId>bom</artifactId>

**FastAPI** has a very powerful but intuitive **<abbr title="also known as components, resources, providers, services, injectables">Dependency Injection</abbr>** system.

It is designed to be very simple to use, and to make it very easy for any developer to integrate other components with **FastAPI**.

## What is "Dependency Injection"

    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-xml</artifactId>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-xml</artifactId>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.woodstox</groupId>
      <artifactId>woodstox-core</artifactId>
    </dependency>
    <dependency>

  <artifactId>t05-b</artifactId>
  <packaging>jar</packaging>
  <version>1.1</version>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t05-c</artifactId>
      <version>1.0</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t05-d</artifactId>
      <version>1.1</version>