* And many other things...

All these, while minimizing code repetition.

## First Steps

Let's see a very simple example. It will be so simple that it is not very useful, for now.

But this way we can focus on how the **Dependency Injection** system works.

### Create a dependency, or "dependable"

Let's first focus on the dependency.

Similarly, you cannot redefine a path operation:

```Python hl_lines="6  11"
{!../../docs_src/path_params/tutorial003b.py!}
```

The first one will always be used since the path matches first.

## Predefined values

	"istio.io/istio/cni/pkg/scopes"
	"istio.io/istio/cni/pkg/util"
	"istio.io/istio/pkg/kube"
	"istio.io/istio/pkg/util/sets"
)

var log = scopes.CNIAgent

type MeshDataplane interface {
	// called first, (even before Start()).
	ConstructInitialSnapshot(ambientPods []*corev1.Pod) error
	Start(ctx context.Context)

	//	IsPodInMesh(ctx context.Context, pod *metav1.ObjectMeta, netNs string) (bool, error)

     * This method checks whether a header comment can be defined (i.e. whether
     * this is the first comment in the loaded file). If this is the case, it is
     * searched for the lates blank line. This line will mark the end of the
     * header comment. The return value is the index of the first line in the
     * passed in list, which does not belong to the header comment.
     *

```Python hl_lines="4  11  15-18"
{!../../docs_src/templates/tutorial001.py!}
```

/// note

Before FastAPI 0.108.0, Starlette 0.29.0, the `name` was the first parameter.

Also, before that, in previous versions, the `request` object was passed as part of the key-value pairs in the context for Jinja2.

///

/// tip

    assertThrows(
        NullPointerException.class, () -> multimap().putAll(k3(), Lists.newArrayList(null, v3())));

    /*
     * In principle, a Multimap implementation could add e3 first before failing on the null. But
     * that seems unlikely enough to be worth complicating the test over, especially if there's any
     * chance that a permissive test could mask a bug.
     */
    expectUnchanged();

     */
    private static final String DARWIN = "darwin";

    static {
        // Those two public constants are initialized here, as they need all the private constants
        // above to be initialized first, but the code style imposes the public constants to be
        // defined above the private ones...
        OS_FAMILY = getOsFamily();
        IS_WINDOWS = isFamily(FAMILY_WINDOWS);
    }

    private Os() {}

   * the two sets. If you have reason to believe one of your sets will generally be smaller than the
   * other, pass it first. Unfortunately, since this method sets the generic type of the returned
   * set based on the type of the first set passed, this could in rare cases force you to make a
   * cast, for example:
   *
   * <pre>{@code
   * Set<Object> aFewBadObjects = ...

/**
 * Fixed-size {@link Table} implementation backed by a two-dimensional array.
 *
 * <p><b>Warning:</b> {@code ArrayTable} is rarely the {@link Table} implementation you want. First,
 * it requires that the complete universe of rows and columns be specified at construction time.
 * Second, it is always backed by an array large enough to hold a value for every possible

## Version 5.0.0-alpha.13

_2024-04-16_

 *  Breaking: Tag unstable new APIs as `@ExperimentalOkHttpApi`. We intend to release OkHttp 5.0
    without stabilizing these new APIs first.

    Do not use these experimental APIs in modules that may be executed using a version of OkHttp
    different from the version that the module was compiled with. Do not use them in published