},
		{ // case 3 unknown pod
			args:           strings.Split("po not-a-pod", " "),
			expectedString: "pods \"not-a-pod\" not found",
			wantException:  true, // "istioctl experimental describe pod not-a-pod" should fail
		},
		{ // case 8 unknown service
			args:           strings.Split("service not-a-service", " "),
			expectedString: "services \"not-a-service\" not found",

  // If not set, use the default values:
  // - For scale up: 0 (i.e. no stabilization is done).
  // - For scale down: 300 (i.e. the stabilization window is 300 seconds long).
  // +optional
  optional int32 stabilizationWindowSeconds = 3;

  // selectPolicy is used to specify which policy should be used.
  // If not set, the default value MaxPolicySelect is used.
  // +optional

/*
 * Copyright 2012-2024 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

  public void testEquals_null() {
    // noinspection ObjectEqualsNull
    assertFalse("An object should not be equal to null.", collection.equals(null));
  }

  public void testEquals_notACollection() {
    // noinspection EqualsBetweenInconvertibleTypes
    assertFalse(
        "A Collection should never equal an object that is not a Collection.",
        collection.equals("huh?"));
  }

/*
 * Copyright 2012-2024 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

        super("The POM expression: " + expression + " could not be evaluated. Reason: " + message, cause);

        this.expression = expression;
        this.originalMessage = message;
    }

    public ModelInterpolationException(String expression, String message) {
        super("The POM expression: " + expression + " could not be evaluated. Reason: " + message);

        this.expression = expression;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * The annotated element must not be null.
 * <p>
 * Annotated fields must not be null after construction has completed.
 * <p>
 * When this annotation is applied to a method it applies to the method return value.
 *
 * @see Nullable
 * @since 4.0.0
 */
@Experimental

     *
     * @param request The toolchains building request that holds the parameters, must not be {@code null}.
     * @return The result of the toolchains building, never {@code null}.
     * @throws ToolchainsBuildingException If the effective toolchains could not be built.
     */
    ToolchainsBuildingResult build(ToolchainsBuildingRequest request) throws ToolchainsBuildingException;

documentation and/or other materials provided with the distribution.
    The names of its contributors may not be used to endorse or promote
products derived from this software without specific prior written
permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

or the:

```Python
= Query(default=None)
```

as it will use that `None` as the default value, and that way make the parameter **not required**.

The `Union[str, None]` part allows your editor to provide better support, but it is not what tells FastAPI that this parameter is not required.

///

Then, we can pass more parameters to `Query`. In this case, the `max_length` parameter that applies to strings:

```Python