<component name="ProjectRunConfigurationManager">
  <configuration default="false" name="Generate Compiler Arguments Copy" type="GradleRunConfiguration" factoryName="Gradle" folderName="Generators">
    <ExternalSystemSettings>
      <option name="executionName" />
      <option name="externalProjectPath" value="$PROJECT_DIR$/generators" />
      <option name="externalSystemIdString" value="GRADLE" />
      <option name="scriptParameters" value="" />

                print("<ERROR TYPE REF>")
            }

            printCollection(namedValues, separator = ", ", prefix = "(", postfix = ")") { argument ->
                append(argument.name.render())
                append(" = ")
                renderConstantValueDebug(argument.expression, printer)
            }
        }
    }

    private fun renderConstantValueDebug(value: KtAnnotationValue, printer: PrettyPrinter) {

// arguments of [cmp.Ordered] types. There must be at least one argument.
// If T is a floating-point type and any of the arguments are NaNs,
// max will return NaN.
func max[T cmp.Ordered](x T, y ...T) T

// The min built-in function returns the smallest value of a fixed number of
// arguments of [cmp.Ordered] types. There must be at least one argument.

            }

            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)

._!==e&&r.push(o[i]);return r.length?n[t]=r:delete n[t],this}},t.exports=n},function(t,e,n){var d=n(5),h=n(6);t.exports=function(t,e,n){if(!t&&!e&&!n)throw new Error("Missing required arguments");if(!d.string(e))throw new TypeError("Second argument must be a String");if(!d.fn(n))throw new TypeError("Third argument must be a Function");if(d.node(t))return s=e,f=n,(l=t).addEventListener(s,f),{destroy:function(){l.removeEventListener(s,f)}};if(d.nodeList(t))return a=t,c=e,u=n,Array.prototype.forEac...

        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

 * </ul>
 *
 * <p>Consumers of this annotation include:
 *
 * <ul>
 *   <li>Kotlin, for which it makes the type-variable usage (a) a Kotlin platform type when the type
 *       argument is non-nullable and (b) nullable when the type argument is nullable. We use this
 *       to "undo" {@link ElementTypesAreNonnullByDefault}. It is the best we can do for Kotlin
 *       under our current constraints.
 *   <li>NullAway, which will <a

 * </ul>
 *
 * <p>Consumers of this annotation include:
 *
 * <ul>
 *   <li>Kotlin, for which it makes the type-variable usage (a) a Kotlin platform type when the type
 *       argument is non-nullable and (b) nullable when the type argument is nullable. We use this
 *       to "undo" {@link ElementTypesAreNonnullByDefault}. It is the best we can do for Kotlin
 *       under our current constraints.
 *   <li>NullAway, which will <a

ECL0001={0} not found
ECL0008=argument[{0}] is null.
ECL0009=argument[{0}] is illegal. because {1}.
ECL0010=argument[{0}] is null or empty string.
ECL0011=argument[{0}] is null or empty array.
ECL0012=argument[{0}] is null or empty collection.
ECL0013=argument[{0}] is null or empty map.
ECL0014=argument[{0}] which is null the index of array is negative integer.
ECL0015=argument[{0}] which is null the index of array exceed the size of array[{1}].

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"