protected function configureOptions(OptionsResolver $resolver): void
    {
        // We set object properties' _default_ values to null to ensure we do not create unnecessary objects.
        $resolver->setDefaults([
            static::CONFIG_USER_AGENT_PREFIX => null,
            static::CONFIG_HTTP_CLIENT_BUILDER => null,
            static::CONFIG_JOURNAL => null,
            static::CONFIG_URI_FACTORY => null,
            static::CONFIG_REQUEST_FACTORY => null,
            static::CONFIG_ERROR_FORMATTER => null,
            static::CONFIG_RETRY_PLUGIN_CONFIG => null,
        ]);
        $resolver->setAllowedTypes(static::CONFIG_USER_AGENT_PREFIX, ['null', 'string']);
        $resolver->setAllowedTypes(static::CONFIG_HTTP_CLIENT_BUILDER, ['null', '\Apigee\Edge\HttpClient\Utility\BuilderInterface']);
        $resolver->setAllowedTypes(static::CONFIG_JOURNAL, ['null', '\Apigee\Edge\HttpClient\Utility\JournalInterface']);
        $resolver->setAllowedTypes(static::CONFIG_URI_FACTORY, ['null', '\Http\Message\UriFactory']);
        $resolver->setAllowedTypes(static::CONFIG_REQUEST_FACTORY, ['null', '\Http\Message\RequestFactory']);
        $resolver->setAllowedTypes(static::CONFIG_ERROR_FORMATTER, ['null', '\Http\Message\Formatter']);
        $resolver->setAllowedTypes(static::CONFIG_RETRY_PLUGIN_CONFIG, ['null', 'array']);
    }
protected function configureOptions(OptionsResolver $resolver): void
    {
        // We set object properties' _default_ values to null to ensure we do not create unnecessary objects.
        $resolver->setDefaults([
            static::CONFIG_USER_AGENT_PREFIX => null,
            static::CONFIG_HTTP_CLIENT_BUILDER => null,
            static::CONFIG_JOURNAL => null,
            static::CONFIG_URI_FACTORY => null,
            static::CONFIG_REQUEST_FACTORY => null,
            static::CONFIG_ERROR_FORMATTER => null,
            static::CONFIG_RETRY_PLUGIN_CONFIG => null,
        ]);
        $resolver->setAllowedTypes(static::CONFIG_USER_AGENT_PREFIX, ['null', 'string']);
        $resolver->setAllowedTypes(static::CONFIG_HTTP_CLIENT_BUILDER, ['null', '\Apigee\Edge\HttpClient\Utility\BuilderInterface']);
        $resolver->setAllowedTypes(static::CONFIG_JOURNAL, ['null', '\Apigee\Edge\HttpClient\Utility\JournalInterface']);
        $resolver->setAllowedTypes(static::CONFIG_URI_FACTORY, ['null', '\Http\Message\UriFactory']);
        $resolver->setAllowedTypes(static::CONFIG_REQUEST_FACTORY, ['null', '\Http\Message\RequestFactory']);
        $resolver->setAllowedTypes(static::CONFIG_ERROR_FORMATTER, ['null', '\Http\Message\Formatter']);
        $resolver->setAllowedTypes(static::CONFIG_RETRY_PLUGIN_CONFIG, ['null', 'array']);
    }
protected function configureOptions ( OptionsResolver $ resolver ) : void { // We set object properties' _default_ values to null to ensure we do not create unnecessary objects. $ resolver -> setDefaults ( [ static :: CONFIG_USER_AGENT_PREFIX => null , static :: CONFIG_HTTP_CLIENT_BUILDER => null , static :: CONFIG_JOURNAL => null , static :: CONFIG_URI_FACTORY => null , static :: CONFIG_REQUEST_FACTORY => null , static :: CONFIG_ERROR_FORMATTER => null , static :: CONFIG_RETRY_PLUGIN_CONFIG => null , ] ) ; $ resolver -> setAllowedTypes ( static :: CONFIG_USER_AGENT_PREFIX , [ 'null' , 'string' ] ) ; $ resolver -> setAllowedTypes ( static :: CONFIG_HTTP_CLIENT_BUILDER , [ 'null' , '\Apigee\Edge\HttpClient\Utility\BuilderInterface' ] ) ; $ resolver -> setAllowedTypes ( static :: CONFIG_JOURNAL , [ 'null' , '\Apigee\Edge\HttpClient\Utility\JournalInterface' ] ) ; $ resolver -> setAllowedTypes ( static :: CONFIG_URI_FACTORY , [ 'null' , '\Http\Message\UriFactory' ] ) ; $ resolver -> setAllowedTypes ( static :: CONFIG_REQUEST_FACTORY , [ 'null' , '\Http\Message\RequestFactory' ] ) ; $ resolver -> setAllowedTypes ( static :: CONFIG_ERROR_FORMATTER , [ 'null' , '\Http\Message\Formatter' ] ) ; $ resolver -> setAllowedTypes ( static :: CONFIG_RETRY_PLUGIN_CONFIG , [ 'null' , 'array' ] ) ; }
Sets default for supported configuration options.

@param \Symfony\Component\OptionsResolver\OptionsResolver $resolver
Option resolver.
Sets default for supported configuration options .