* the {@code E} type variable declared by class {@code List} naturally maps to {@code String} in
 * the context of {@code class MyStringList implements List<String>}). In such case, prefer to use
 * {@link TypeToken#resolveType} since it's simpler and more type safe. This class should only be
 * used when the type mapping isn't implied by the static type hierarchy, but provided through other

# Bigger Applications - Multiple Files

If you are building an application or a web API, it's rarely the case that you can put everything in a single file.

**FastAPI** provides a convenience tool to structure your application while keeping all the flexibility.

/// info

If you come from Flask, this would be the equivalent of Flask's Blueprints.

///

## An example file structure

Let's say you have a file structure like this:

```

			size:       4,
			actualSize: 4,
			md5hex:     "e2fc714c4727ee9395f324cd2e7f331f",
			err:        ioutil.ErrOverread,
		},
	}
	for i, testCase := range testCases {
		t.Run(fmt.Sprintf("case-%d", i+1), func(t *testing.T) {
			r, err := NewReader(context.Background(), testCase.src, testCase.size, testCase.md5hex, testCase.sha256hex, testCase.actualSize)
			if err != nil {

	return func() (*[]istioVersion.ProxyInfo, error) {
		pi := []istioVersion.ProxyInfo{}
		for _, resource := range (*xdsResponse).Resources {
			switch resource.TypeUrl {
			case "type.googleapis.com/envoy.config.core.v3.Node":
				node := core.Node{}
				err := resource.UnmarshalTo(&node)
				if err != nil {
					return nil, fmt.Errorf("could not unmarshal Node: %w", err)
				}

				if err != nil {
					t.Errorf("Error: %d %d %v", i, j, err)
				}
				if !reflect.DeepEqual(r, tc.res[j]) {
					fmt.Printf("%#v (%v) != %v (%v)\n", r, reflect.TypeOf(r), tc.res[j], reflect.TypeOf(tc.res[j]))
					t.Errorf("case: %d %d failed", i, j)
				}
			}
		})
	}

  /**
   * A proxy method that adds the node {@code n} to the graph being tested. In case of Immutable
   * graph implementations, this method should replace {@link #graph} with a new graph that includes
   * this node.
   */
  abstract void addNode(Integer n);

  /**
   * A proxy method that adds the edge {@code e} to the graph being tested. In case of Immutable

    // Check that this thread has been marked as interrupted again now that the thread has been
    // returned by SequentialExecutor. Clear the bit while checking so that the test doesn't hose
    // JUnit or some other test case.
    assertThat(Thread.interrupted()).isTrue();
  }

  public void testInterrupt_doesNotInterruptSubsequentTask() throws Exception {
    // Run a task that interrupts its thread (i.e. this thread).
    e.execute(

  fi

  if [ -f "$HOME/.mavenrc" ] ; then
    . "$HOME/.mavenrc"
  fi

fi

# OS specific support.  $var _must_ be set to either true or false.
cygwin=false;
darwin=false;
mingw=false
case "`uname`" in
  CYGWIN*) cygwin=true ;;
  MINGW*) mingw=true;;
  Darwin*) darwin=true
    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home

    int initialCapacity = INNER_CAPACITY * 2;

    List<NodeConnection<N>> orderedNodeConnections;
    switch (incidentEdgeOrder.type()) {
      case UNORDERED:
        orderedNodeConnections = null;
        break;
      case STABLE:
        orderedNodeConnections = new ArrayList<>();
        break;
      default:
        throw new AssertionError(incidentEdgeOrder.type());
    }

This way you will be able to have things ordered and grouped correctly for the client code:

<img src="/img/tutorial/generate-clients/image06.png">

In this case you have:

* `ItemsService`
* `UsersService`

### Client Method Names

Right now the generated method names like `createItemItemsPost` don't look very clean:

```TypeScript