<div class="screenshot">
<img src="/img/tutorial/header-param-models/image01.png">
</div>

### Proibindo Cabeçalhos adicionais

Em alguns casos de uso especiais (provavelmente não muito comuns), você pode querer **restringir** os cabeçalhos que você quer receber.

Você pode usar a configuração dos modelos do Pydantic para proibir (`forbid`) quaisquer campos `extra`:

//// tab | Python 3.10+

            <model>src/main/mdo/settings.mdo</model>
          </models>
          <params>
            <param>forcedIOModelVersion=1.2.0</param>
            <param>packageModelV3=org.apache.maven.settings</param>
            <param>packageModelV4=org.apache.maven.api.settings</param>
            <param>packageToolV4=org.apache.maven.settings.v4</param>
          </params>
        </configuration>
        <executions>
          <execution>

          </models>
          <params>
            <param>forcedIOModelVersion=4.0.0</param>
            <param>packageModelV3=org.apache.maven.model</param>
            <param>packageModelV4=org.apache.maven.api.model</param>
            <param>packageToolV4=org.apache.maven.model.v4</param>
            <param>isMavenModel=true</param>
            <param>minimalVersion=4.0.0</param>
          </params>
        </configuration>

          </models>
          <params>
            <param>forcedIOModelVersion=1.1.0</param>
            <param>packageModelV3=org.apache.maven.artifact.repository.metadata</param>
            <param>packageModelV4=org.apache.maven.api.metadata</param>
            <param>packageToolV4=org.apache.maven.artifact.repository.metadata.io</param>
          </params>

                <template>model-v3.vm</template>
              </templates>
              <params>
                <param>packageModelV3=org.apache.maven.toolchain.model</param>
                <param>packageModelV4=org.apache.maven.api.toolchain</param>
                <param>packageToolV4=org.apache.maven.toolchain.v4</param>
              </params>
            </configuration>
          </execution>
        </executions>
      </plugin>

              </templates>
              <params>
                <param>packageModelV3=org.apache.maven.plugin.descriptor</param>
                <param>packageModelV4=org.apache.maven.api.plugin.descriptor</param>
                <param>packageToolV4=org.apache.maven.plugin.descriptor.io</param>
              </params>
              <models>

     * created automatically.
     *
     * @param output The file to serialize the model to, must not be {@code null}.
     * @param options The options to use for serialization, may be {@code null} to use the default values.
     * @param model The model to serialize, must not be {@code null}.
     * @throws IOException If the model could not be serialized.
     */

			<param name="module.groupId" value="org/codelibs/opensearch/module" />
			<param name="module.name.prefix" value="" />
			<param name="module.name" value="mapper-extras" />
			<param name="module.version" value="${opensearch.version}" />
			<param name="module.zip.version" value="${opensearch.version}" />
		</antcall>
		<!-- reindex -->
		<antcall target="install.module">

     * filename of the source file.
     *
     * @param basedir the directory where the artifact is stored
     * @param finalName the name of the artifact without extension
     * @param artifact the artifact definition
     * @param deploymentRepository the repository to deploy to
     * @param localRepository the local repository to install into

    /**
     * Sets the state of the "add default entities" flag.
     *
     * @param addDefaultEntities a addDefaultEntities object.
     */
    public void setAddDefaultEntities(boolean addDefaultEntities) {
        delegate.setAddDefaultEntities(addDefaultEntities);
    }

    /**
     * @param reader a reader object.
     * @param strict a strict object.
     * @throws IOException IOException if any.