println("internal fun $CONVERT_ARGUMENT(argument: Any?, analysisSession: KtFirAnalysisSession): Any? {")
        withIndent {
            println("return $CONVERT_ARGUMENT(argument, analysisSession.firSymbolBuilder)")
        }
        println("}")
        println()

        println("private fun $CONVERT_ARGUMENT(argument: Any?, firSymbolBuilder: KtSymbolByFirBuilder): Any? {")
        withIndent {

        is FirTypeParameterSymbol -> convertArgument(argument, firSymbolBuilder)
        is FirCallableSymbol<*> -> convertArgument(argument, firSymbolBuilder)
        is FirClassSymbol<*> -> convertArgument(argument, firSymbolBuilder)
        is FirClassLikeSymbol<*> -> convertArgument(argument, firSymbolBuilder)
        is FirBasedSymbol<*> -> convertArgument(argument, firSymbolBuilder)

from unicorn import UnicornMiddleware

app = FastAPI()

app.add_middleware(UnicornMiddleware, some_config="rainbow")
```

`app.add_middleware()` receives a middleware class as the first argument and any additional arguments to be passed to the middleware.

## Integrated middlewares

**FastAPI** includes several middlewares for common use cases, we'll see next how to use them.

!!! note "Technical Details"

 * limitations under the License.
 */
package okhttp3.curl

import com.github.ajalt.clikt.core.CliktCommand
import com.github.ajalt.clikt.parameters.arguments.argument
import com.github.ajalt.clikt.parameters.options.default
import com.github.ajalt.clikt.parameters.options.flag
import com.github.ajalt.clikt.parameters.options.multiple

        val ktExpression = expression.getParentOfType<KtExpression>(false) ?: return null
        val parentExpression = if (ktExpression.parent is KtLabeledExpression) {
            // lambda -> labeled expression -> lambda argument (value argument)
            ktExpression.parent.parent
        } else {
            ktExpression.parent
        }

        // Unwrap specific expressions
        when (ktExpression) {

     */
    internal
    val isRaw: Boolean
        get() = type?.typeParameters?.isEmpty() != false || typeArguments.isEmpty()
}


enum class Variance {

    /**
     * Represent an invariant type argument.
     * e.g. `<T>`
     */
    INVARIANT,

    /**
     * Represent a covariant type argument.

        return when (this) {
            KtTypeMappingMode.DEFAULT -> TypeMappingMode.DEFAULT
            KtTypeMappingMode.DEFAULT_UAST -> TypeMappingMode.DEFAULT_UAST
            KtTypeMappingMode.GENERIC_ARGUMENT -> TypeMappingMode.GENERIC_ARGUMENT
            KtTypeMappingMode.SUPER_TYPE -> TypeMappingMode.SUPER_TYPE
            KtTypeMappingMode.SUPER_TYPE_KOTLIN_COLLECTIONS_AS_IS -> TypeMappingMode.SUPER_TYPE_KOTLIN_COLLECTIONS_AS_IS

Mais si vous décidez d'apprendre à les utiliser, sachez qu'ensuite vous pouvez les utiliser directement dans **FastAPI**.

## Valeurs par défaut

De la même façon que vous pouvez passer `None` comme premier argument pour l'utiliser comme valeur par défaut, vous pouvez passer d'autres valeurs.

Disons que vous déclarez le paramètre `q` comme ayant une longueur minimale de `3`, et une valeur par défaut étant `"fixedquery"` :

            }

            is FirVarargArgumentsExpression -> {
                // Vararg arguments may have multiple independent expressions associated.
                // Choose one to be the representative PSI value for the entire assembled argument.
                val (annotationValues, representativePsi) = arguments.convertVarargsExpression(builder)

        val result = LinkedHashMap<KtExpression, KtVariableLikeSignature<KtValueParameterSymbol>>()
        for ((parameter, arguments) in valueArguments) {
            val parameterSymbol = KtFe10DescValueParameterSymbol(parameter, analysisContext)

            for (argument in arguments.arguments) {
                val expression = argument.getArgumentExpression() ?: continue