You can define dependencies that in turn can define dependencies themselves.

In the end, a hierarchical tree of dependencies is built, and the **Dependency Injection** system takes care of solving all these dependencies for you (and their sub-dependencies) and providing (injecting) the results at each step.

* All these *path operations* will have the list of `dependencies` evaluated/executed before them.
    * If you also declare dependencies in a specific *path operation*, **they will be executed too**.
    * The router dependencies are executed first, then the [`dependencies` in the decorator](dependencies/dependencies-in-path-operation-decorators.md){.internal-link target=_blank}, and then the normal parameter dependencies.

    - tutorial/body-updates.md
    - Dependencies:
      - tutorial/dependencies/index.md
      - tutorial/dependencies/classes-as-dependencies.md
      - tutorial/dependencies/sub-dependencies.md
      - tutorial/dependencies/dependencies-in-path-operation-decorators.md
      - tutorial/dependencies/global-dependencies.md
      - tutorial/dependencies/dependencies-with-yield.md
    - Security:

        Element root = doc.root();
        Element dependencies = root.child("dependencies").orElse(null);
        assertNotNull(dependencies, "dependencies should exist");
        Element dependency = dependencies.child("dependency").orElse(null);
        assertNotNull(dependency, "dependency should exist");

        // Insert elements in dependency according to dependency ordering

        assertEquals("b", pom.getValue("build/plugins[1]/dependencies[3]/artifactId"));
        assertEquals("1", pom.getValue("build/plugins[1]/dependencies[3]/version"));
        assertEquals("e", pom.getValue("build/plugins[1]/dependencies[4]/artifactId"));
        assertEquals("1", pom.getValue("build/plugins[1]/dependencies[4]/version"));
        assertEquals("d", pom.getValue("build/plugins[1]/dependencies[5]/artifactId"));

  dependencies:
    "@types/node" "*"

"@types/eslint-scope@^3.7.3":
  version "3.7.4"
  resolved "https://registry.yarnpkg.com/@types/eslint-scope/-/eslint-scope-3.7.4.tgz#37fc1223f0786c39627068a12e94d6e6fc61de16"
  integrity sha512-9K4zoImiZc3HlIp6AVUDE4CWYx22a+lhSZMYNpbjW04+YF0KWj4pJXnEMjdnFTiQibFFmElcsasJXDbdI/EPhA==
  dependencies:
    "@types/eslint" "*"
    "@types/estree" "*"

     * Gets the dependencies that were successfully resolved.
     *
     * @return The resolved dependencies, never {@code null}.
     */
    List<Dependency> getResolvedDependencies();

    /**
     * Gets the dependencies that could not be resolved.
     *
     * @return The unresolved dependencies, never {@code null}.
     */
    List<Dependency> getUnresolvedDependencies();

    /**

/**
 * Collects, flattens and resolves dependencies.
 */
@Experimental
public interface DependencyResolver extends Service {

    /**
     * Collects the transitive dependencies of some artifacts and builds a dependency graph for the given path scope.
     * Note that this operation is only concerned about determining the coordinates of the transitive dependencies and
     * does not actually resolve the artifact files.
     *

    def fun(deps: DepList):
        deps.append(name)

    return Depends(fun)


router = APIRouter(dependencies=[create_dependency("router")])
prefix_router = APIRouter(dependencies=[create_dependency("prefix_router")])
app = FastAPI(dependencies=[create_dependency("app")])


@app.websocket("/", dependencies=[create_dependency("index")])
async def index(websocket: WebSocket, deps: DepList):
    await websocket.accept()

         */
        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()) {