Наприклад, додаймо [розширення OpenAPI ReDoc для додавання власного логотипа](https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo).

### Звичайний **FastAPI** { #normal-fastapi }

Спочатку напишіть ваш застосунок **FastAPI** як зазвичай:

{* ../../docs_src/extending_openapi/tutorial001_py310.py hl[1,4,7:9] *}

import mockwebserver3.MockWebServer
import mockwebserver3.junit5.StartStop
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.testing.PlatformRule
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

/**
 * OkHttp.
 *
 * https://square.github.io/okhttp/
 */
class OkHttpClientTest {
  @JvmField @RegisterExtension
  val platform = PlatformRule()

  @StartStop

import mockwebserver3.MockWebServer
import mockwebserver3.junit5.StartStop
import okhttp3.testing.PlatformRule
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

class LoomTest {
  @JvmField
  @RegisterExtension
  val platform = PlatformRule()

  @JvmField
  @RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

  @StartStop

		},
		{
			n: NoncurrentVersionExpiration{
				NoncurrentDays:          90,
				NewerNoncurrentVersions: -2,
				set:                     true,
			},
			err: errXMLNotWellFormed,
		},
		// MinIO extension: supports zero NoncurrentDays when NewerNoncurrentVersions > 0
		{
			n: NoncurrentVersionExpiration{
				NoncurrentDays:          0,
				NewerNoncurrentVersions: 5,
				set:                     true,
			},

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.opensearch.extension.analysis;

import org.apache.lucene.analysis.TokenStream;
import org.codelibs.analysis.en.FlexiblePorterStemFilter;
import org.opensearch.common.settings.Settings;
import org.opensearch.env.Environment;

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.opensearch.extension.kuromoji.index.analysis;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.ja.JapaneseAnalyzer;

import org.apache.maven.api.di.Named;

/**
 * Service provider interface for registering custom {@link ProjectScope} implementations.
 * <p>
 * This interface allows plugins and extensions to define and register additional project scopes
 * beyond the standard {@link ProjectScope#MAIN} and {@link ProjectScope#TEST} scopes.
 * Implementations of this interface will be discovered through the Java ServiceLoader mechanism

import okhttp3.DelegatingSSLSocket
import okhttp3.internal.platform.Jdk9Platform.Companion.buildIfSupported
import okhttp3.testing.PlatformRule
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

class Jdk9PlatformTest {
  @RegisterExtension
  val platform = PlatformRule()

  @Test
  fun buildsWhenJdk9() {
    platform.assumeJdk9()
    assertThat(buildIfSupported()).isNotNull()

with mime type "+k+" which is not allowed"),e(this,"wrongFileType",l.join(", "),h))),i}return a.formUtils.warn("FileReader not supported by browser, will check file extension"),a.formUtils.validators.validate_extension.validatorFunction(b,f,g,h)},errorMessage:"",errorMessageKey:"wrongFileType"}),a.formUtils.addValidator({name:"extension",validatorFunction:function(b,c,f,g){var h=!0,i=this,j=d(c);return a.each(c.get(0).files||[b],function(b,c){var d="string"==typeof c?c:c.value||c.fileName||c.name,...

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.opensearch.extension.analysis;

import java.util.List;
import java.util.Locale;

import org.apache.lucene.analysis.TokenStream;
import org.codelibs.analysis.ja.StopTokenSuffixFilter;
import org.opensearch.common.settings.Settings;