}

                // start building an argument here.
                currentArg = new StringBuilder(arg.substring(1));
                addedToBuffer = true;
            }

            // this has to be a separate "if" statement, to capture the case of: "-Dfoo=bar"
            if (addedToBuffer && arg.endsWith("\"")) {
                // if we're building an argument, keep doing so.

Avoid writing the so-called `PolyNull` or `ParametricNull` methods (where nullability of the result depends on the nullability of the type argument).
One particular example is when a [method returns `null` if and only if its argument is `null`](https://github.com/gradle/gradle/blob/674b8430b024f03cae24f1e4dd6dbaa78b557dae/platforms/core-runtime/base-services/src/main/java/org/gradle/util/internal/TextUtil.java#L163).

     * @return the {@link ProjectBuilderResult} containing the built project and possible errors
     * @throws ProjectBuilderException if the project cannot be created
     * @throws IllegalArgumentException if an argument is {@code null} or invalid
     */
    @Nonnull
    ProjectBuilderResult build(ProjectBuilderRequest request) throws ProjectBuilderException;

    /**

used to refer to function arguments.
The compilers maintain a virtual frame pointer and refer to the arguments on the stack as offsets from that pseudo-register.
Thus <code>0(FP)</code> is the first argument to the function,
<code>8(FP)</code> is the second (on a 64-bit machine), and so on.
However, when referring to a function argument this way, it is necessary to place a name

                }

                // start building an argument here.
                currentArg = new StringBuilder(arg.substring(1));
                addedToBuffer = true;
            }

            // this has to be a separate "if" statement, to capture the case of: "-Dfoo=bar"
            if (addedToBuffer && arg.endsWith("\"")) {
                // if we're building an argument, keep doing so.

                // Space outside quotes - end of argument
                if (current.length() > 0) {
                    args.add(current.toString());
                    current.setLength(0);
                }
            } else {
                current.append(c);
            }
        }

        // Add last argument
        if (current.length() > 0) {
            args.add(current.toString());

     * @return the collection result, never {@code null}
     * @throws DependencyResolverException if the dependency tree could not be built
     * @throws IllegalArgumentException if an argument is null or invalid
     * @see #collect(DependencyResolverRequest)
     */
    @Nonnull
    default DependencyResolverResult collect(

from unicorn import UnicornMiddleware

app = FastAPI()

app.add_middleware(UnicornMiddleware, some_config="rainbow")
```

`app.add_middleware()` empfängt eine Middleware-Klasse als erstes Argument und dann alle weiteren Argumente, die an die Middleware übergeben werden sollen.

## Integrierte Middleware { #integrated-middlewares }

 *       typically because the type forbids nullable type arguments: For example, {@code
 *       ImmutableList.get} returns {@code E}, but that value is never {@code null}. (Accordingly,
 *       {@code ImmutableList} is declared to forbid {@code ImmutableList<@Nullable String>}.)
 *   <li>methods whose return type is a type variable but which can return {@code null} regardless
 *       of the type argument supplied by the user of the class: For example, {@code

 *       typically because the type forbids nullable type arguments: For example, {@code
 *       ImmutableList.get} returns {@code E}, but that value is never {@code null}. (Accordingly,
 *       {@code ImmutableList} is declared to forbid {@code ImmutableList<@Nullable String>}.)
 *   <li>methods whose return type is a type variable but which can return {@code null} regardless
 *       of the type argument supplied by the user of the class: For example, {@code