### Include a *path operation* { #include-a-path-operation }

We can also add *path operations* directly to the `FastAPI` app.

Here we do it... just to show that we can 🤷:

{* ../../docs_src/bigger_applications/app_an_py310/main.py hl[21:23] title["app/main.py"] *}

    return stringWriter.toString();
  }

  /**
   * Returns the stack trace of {@code throwable}, possibly providing slower iteration over the full
   * trace but faster iteration over parts of the trace. Here, "slower" and "faster" are defined in
   * comparison to the normal way to access the stack trace, {@link Throwable#getStackTrace()
   * throwable.getStackTrace()}. Note, however, that this method's special implementation is not

					cg = decl.Doc
				}
				if cg != nil {
					if strings.ContainsAny(abspath, "\r\n") {
						// This should have been checked when the file path was first resolved,
						// but we double check here just to be sure.
						fatalf("internal error: ParseGo: abspath contains unexpected newline character: %q", abspath)
					}
					f.Preamble += fmt.Sprintf("#line %d %q\n", sourceLine(cg), abspath)

 * are. It is also likely that properties must be specified for jcifs.smb1
 * to function (See <a href="../../overview-summary.html#scp">Setting
 * JCIFS Properties</a>). Here are some examples of SMB URLs with brief
 * descriptions of what they do:
 *
 * <p>[1] This URL scheme is based largely on the <i>SMB
 * Filesharing URL Scheme</i> IETF draft.
 *
 * <table border="1">

   * computes) correspond to minimum intervals between subsequent requests, for the specified number
   * of requested permits.
   *
   * Here is an example of storedPermitsToWaitTime: If storedPermits == 10.0, and we want 3 permits,
   * we take them from storedPermits, reducing them to 7.0, and compute the throttling for these as

          public final void addListener(Listener listener, Executor executor) {
            service1.startAsync();
            delegate.addListener(listener, executor);
          }

          // Delegates from here on down
          @Override
          public final Service startAsync() {
            return delegate.startAsync();
          }

          @Override
          public final Service stopAsync() {

		// Previously, this value was set right before a response was sent to
		// the client. So, logger and Error response XML were not using this
		// value. This is set here so that this header can be logged as
		// part of the log entry, Error response XML and auditing.
		// Set custom headers such as x-amz-request-id for each request.

		pi, ok := rememberedPools[k]
		if !ok {
			// we do not have the pool anymore that we previously remembered, since all
			// the CLI checks out we can allow updates since we are mostly adding a pool here.
			update = true
		}
		if ok && pi.completed {
			logger.LogIf(GlobalContext, "decommission", fmt.Errorf("pool(%s) = %s is decommissioned, please remove from server command line", humanize.Ordinal(pi.position+1), k))
		}

	// #include <stdio.h>
	// #include <errno.h>
	import "C"

The preamble may contain any C code, including function and variable
declarations and definitions. These may then be referred to from Go
code as though they were defined in the package "C". All names
declared in the preamble may be used, even if they start with a
lower-case letter. Exception: static variables in the preamble may
not be referenced from Go code; static functions are permitted.

C'est pourquoi, dans cet exemple, nous devons le déclarer dans le paramètre `response_model`.

... mais continuez à lire ci-dessous pour voir comment contourner cela.

## Type de retour et filtrage des données { #return-type-and-data-filtering }