* An optional `grant_type`.

!!! tip
    The OAuth2 spec actually *requires* a field `grant_type` with a fixed value of `password`, but `OAuth2PasswordRequestForm` doesn't enforce it.

    If you need to enforce it, use `OAuth2PasswordRequestFormStrict` instead of `OAuth2PasswordRequestForm`.

* An optional `client_id` (we don't need it for our example).
* An optional `client_secret` (we don't need it for our example).

          <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-enforcer-plugin</artifactId>
            <version>1.0-alpha-3</version>
            <executions>
              <execution>
                <id>enforce-jdk-15</id>
                <goals>
                  <goal>enforce</goal>
                </goals>
                <configuration>
                  <rules>

  }

  @Override
  protected Map<Class<? extends @NonNull B>, B> delegate() {
    return delegate;
  }

  /**
   * Wraps the {@code setValue} implementation of an {@code Entry} to enforce the class constraint.
   */
  private static <B extends @Nullable Object> Entry<Class<? extends @NonNull B>, B> checkedEntry(
      final Entry<Class<? extends @NonNull B>, B> entry) {

          <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-enforcer-plugin</artifactId>
            <version>1.0-alpha-3</version>
            <executions>
              <execution>
                <id>enforce-jdk-15</id>
                <goals>
                  <goal>enforce</goal>
                </goals>
                <configuration>
                  <rules>

			if r.URL.Path == rquestTimesOutPath {
				defer close(reqHandlerCompletedCh)

				// this will force the request to time out.
				<-callerRoundTripDoneCh
			}
		})

		// NOTE: the server will enforce a 5s timeout on every
		//  incoming request, and the client enforces a timeout of 1m.
		handler := newHandlerChain(t, requestHandler, controller, userName, 5*time.Second)

  }

  @Override
  protected Map<Class<? extends @NonNull B>, B> delegate() {
    return delegate;
  }

  /**
   * Wraps the {@code setValue} implementation of an {@code Entry} to enforce the class constraint.
   */
  private static <B extends @Nullable Object> Entry<Class<? extends @NonNull B>, B> checkedEntry(
      final Entry<Class<? extends @NonNull B>, B> entry) {

// should be extended to construct environments with the appropriate variable definitions,
// type declarations and any other needed configuration.
// strictCost is used to determine whether to enforce strict cost calculation for CEL expressions.
func MustBaseEnvSet(ver *version.Version, strictCost bool) *EnvSet {
	if ver == nil {
		panic("version must be non-nil")
	}
	if len(ver.Components()) < 2 {

	DefaultServiceAccountName = "default"

	// EnforceMountableSecretsAnnotation is a default annotation that indicates that a service account should enforce mountable secrets.
	// The value must be true to have this annotation take effect
	EnforceMountableSecretsAnnotation = "kubernetes.io/enforce-mountable-secrets"

	// ServiceAccountVolumeName is the prefix name that will be added to volumes that mount ServiceAccount secrets

Convention plugins are also used to enforce project standards and help streamline the build process.
They can apply and configure plugins, create new tasks and extensions, set dependencies, and much more.

[[sec:the_plugin_id]]
== Setting the plugin ID

microservices](https://istio.io/latest/docs/examples/microservices-istio/), manage [traffic flow](https://istio.io/latest/docs/concepts/traffic-management/) across microservices, enforce policies
and aggregate telemetry data. Istio's control plane provides an abstraction
layer over the underlying cluster management platform, such as Kubernetes.

Istio is composed of these components: