assertFalse(artifact.getArtifactId().equals("t07-d"));
            System.out.println("Artifact: " + artifact.getDependencyConflictId() + " " + artifact.getVersion()
                    + " Optional=" + (artifact.isOptional() ? "true" : "false"));
            assertTrue(
                    artifact.getVersion().equals("1.0"), "Incorrect version for " + artifact.getDependencyConflictId());
        }
    }

# 
# Environment variables:
#   DEFAULT_BRANCH  - The default branch to create the pull request on (e.g. "master"/"release")
#   GITHUB_TOKEN    - GitHub bot token
#   TRIGGERED_BY    - Optional. If it's "Release - Final", version will be from version-info-final-release/version-info.properties
#                     If it's "Release - Release Candidate", version will be from version-info-release-candidate/version-info.properties

 * under the License.
 */
package org.apache.maven.cling.invoker.mvnup.goals;

import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Stream;

import eu.maveniverse.domtrip.Document;
import org.apache.maven.api.cli.mvnup.UpgradeOptions;
import org.apache.maven.cling.invoker.mvnup.UpgradeContext;

   *
   * @since 8.0
   */
  public static final byte ESC = 27;

  /**
   * File Separator: These four information separators may be used within data in optional fashion,
   * except that their hierarchical relationship shall be: FS is the most inclusive, then GS, then
   * RS, and US is least inclusive. (The content and length of a File, Group, Record, or Unit are
   * not specified.)

  }

  // common.base
  @Empty
  <T> com.google.common.base.Optional<T> generateGoogleOptional() {
    return com.google.common.base.Optional.absent();
  }

  @Generates
  <T> com.google.common.base.Optional<T> generateGoogleOptional(T value) {
    return com.google.common.base.Optional.of(value);
  }

  @Generates
  Joiner generateJoiner() {

# ----------------------------------------------------------------------------

# ----------------------------------------------------------------------------
# Apache Maven Wrapper startup batch script, version 3.3.4
#
# Optional ENV vars
# -----------------
#   JAVA_HOME - location of a JDK home dir, required when download maven via java source
#   MVNW_REPOURL - repo url base for downloading maven distribution

        Class<?> processHandleInfoClass = Class.forName("java.lang.ProcessHandle$Info");
        Class<?> optionalClass = Class.forName("java.util.Optional");
        /*
         * We don't *need* to use reflection to access Optional: It's available on all JDKs we
         * support, and Android code won't get this far, anyway, because ProcessHandle is

  /**
   * ```
   * Point ::= SEQUENCE {
   *   x [0] INTEGER OPTIONAL,
   *   y [1] INTEGER OPTIONAL
   * }
   * ```
   */
  data class Point(
    val x: Long?,
    val y: Long?,
  ) {
    companion object {
      val ADAPTER =
        Adapters.sequence(
          "Point",
          Adapters.INTEGER_AS_LONG.withTag(tag = 0L).optional(),
          Adapters.INTEGER_AS_LONG.withTag(tag = 1L).optional(),

* 変数`prices`は`dict`であり:
    * この`dict`のキーは`str`型です。（つまり、各項目の名前）
    * この`dict`の値は`float`型です。（つまり、各項目の価格）

#### `Optional`

また、`Optional`を使用して、変数が`str`のような型を持つことを宣言することもできますが、それは「オプション」であり、`None`にすることもできます。

```Python hl_lines="1 4"
{!../../docs_src/python_types/tutorial009.py!}
```

ただの`str`の代わりに`Optional[str]`を使用することで、エディタは値が常に`str`であると仮定している場合に実際には`None`である可能性があるエラーを検出するのに役立ちます。

#### ジェネリック型

      Nvidia GPUs".
    enabled_by_default: boolean for default behavior.
    question: optional string for how to ask for user input.
    yes_reply: optional string for reply when feature is enabled.
    no_reply: optional string for reply when feature is disabled.

  Returns:
    boolean value of the variable.

  Raises: