decompose = {
        listOf(
          it.version,
          it.serialNumber,
          it.signature,
          rdnSequence to it.issuer,
          it.validity,
          rdnSequence to it.subject,
          it.subjectPublicKeyInfo,
          it.issuerUniqueID,
          it.subjectUniqueID,
          it.extensions,
        )
      },
      construct = {

        });

        ShareEnumIterator it = new ShareEnumIterator(parent, entries.iterator(), filter);

        // Returns only accepted resources
        assertTrue(it.hasNext());
        assertEquals("keep1/", it.next().getName());
        assertTrue(it.hasNext());
        assertEquals("keep2/", it.next().getName());
        assertFalse(it.hasNext());

        // Verify filter called once per entry

  val firefox53 = sslLabsClients.first { it.userAgent == "Firefox" && it.version == "53" }
  val firefox73 = sslLabsClients.first { it.userAgent == "Firefox" && it.version == "73" }
  val java7 = sslLabsClients.first { it.userAgent == "Java" && it.version == "7u25" }
  val java12 = sslLabsClients.first { it.userAgent == "Java" && it.version == "12.0.1" }

It used custom types in its declarations instead of standard Python types, but it was still a huge step forward.

It also was one of the first frameworks to generate a custom schema declaring the whole API in JSON.

It was not based on a standard like OpenAPI and JSON Schema. So it wouldn't be straightforward to integrate it with other tools, like Swagger UI. But again, it was a very innovative idea.

    public void test() throws Exception {
        final ClassIterator it = new ClassIterator(Integer.class);
        assertThat(it.hasNext(), is(true));
        assertThat(it.next(), is(sameClass(Integer.class)));

        assertThat(it.hasNext(), is(true));
        assertThat(it.next(), is(sameClass(Number.class)));

        assertThat(it.hasNext(), is(true));
        assertThat(it.next(), is(sameClass(Object.class)));

        // Act
        TestIterator it = TestIterator.create(tree, parent, wildcard, null, attrs, initial, pages);

        // Assert
        assertSame(tree, it.getTreeHandle(), "tree handle should be same instance returned by acquire");
        assertEquals(attrs, it.getSearchAttributes());
        assertEquals(wildcard, it.getWildcard());
        assertSame(parent, it.getParent());
        verify(tree, times(1)).acquire();

                            os to (testProject to performanceTestDuration)
                        }
                }
            }
        return pairs
            .groupBy({ it.first }, { it.second })
            .mapValues { entry -> entry.value.groupBy({ it.first }, { it.second }) }
    }

    private fun readPerformanceTestConfigurations(performanceTestsCiJson: File): List<PerformanceTestConfiguration> {

Let's use the tools provided by **FastAPI** to handle security.

## How it looks { #how-it-looks }

Let's first just use the code and see how it works, and then we'll come back to understand what's happening.

## Create `main.py` { #create-main-py }

Copy the example in a file `main.py`:

{* ../../docs_src/security/tutorial001_an_py39.py *}

## Run it { #run-it }

/// info

* It takes each **request** that comes to your application.
* It can then do something to that **request** or run any needed code.
* Then it passes the **request** to be processed by the rest of the application (by some *path operation*).

    val response1Body =
      client.newCall(request).execute().use {
        if (!it.isSuccessful) throw IOException("Unexpected code $it")

        println("Response 1 response:          $it")
        println("Response 1 cache response:    ${it.cacheResponse}")
        println("Response 1 network response:  ${it.networkResponse}")
        return@use it.body.string()
      }

    val response2Body =