* class could be unloaded after the above call to `getEnumConstants` but before we call
     * `get()`, but that is vanishingly unlikely.
     */
    return ref == null ? Optional.absent() : Optional.fromNullable(enumClass.cast(ref.get()));
  }

  static String formatCompact4Digits(double value) {
    return String.format(Locale.ROOT, "%.4g", value);
  }

import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;

/**
 * Build service for detecting available Docker installation and checking for compatibility with Elasticsearch Docker image build

	expireYaml := `
expire: # Expire objects that match a condition
  apiVersion: v1
  bucket: mybucket # Bucket where this batch job will expire matching objects from
  prefix: myprefix # (Optional) Prefix under which this job will expire objects matching the rules below.
  rules:
    - type: object  # regular objects with zero or more older versions
      name: NAME # match object names that satisfy the wildcard expression.

      </dependency>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t08-d</artifactId>
        <version>1.2</version>
        <scope>test</scope>
        <optional>false</optional>
      </dependency>
    </dependencies>
  </dependencyManagement>

import org.gradle.api.internal.ConventionTask;
import org.gradle.api.tasks.Input;
import org.gradle.api.tasks.InputDirectory;
import org.gradle.api.tasks.InputFiles;
import org.gradle.api.tasks.Optional;
import org.gradle.api.tasks.OutputFile;
import org.gradle.api.tasks.TaskAction;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;

      </dependency>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t08-d</artifactId>
        <version>1.0</version>
        <scope>test</scope>
        <optional>true</optional>
      </dependency>
    </dependencies>
  </dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t08-a</artifactId>
      <version>1.0</version>

     *
     * @param session The Maven session context
     * @param type The type of toolchain to retrieve
     * @return Optional containing the toolchain if found
     * @throws ToolchainManagerException if toolchain retrieval fails
     */
    @Nonnull
    Optional<Toolchain> getToolchainFromBuildContext(@Nonnull Session session, @Nonnull String type)
            throws ToolchainManagerException;

    /**

     * @return Java path type associated to the given location
     */
    public static Optional<JavaPathType> valueOf(JavaFileManager.Location location) {
        for (JavaPathType type : JavaPathType.values()) {
            if (location.equals(type.location)) {
                return Optional.of(type);
            }
        }
        return Optional.empty();
    }

    /**

import java.util.List;
import java.util.Optional;

public class JavaUtil {

    /** A convenience method for getting java home for a version of java and requiring that version for the given task to execute */
    public static String getJavaHome(final int version) {
        List<JavaHome> javaHomes = BuildParams.getJavaVersions();

			Type:        "on|off",
			Description: "set to enable callhome" + defaultHelpPostfix(Enable),
			Optional:    true,
		},
		config.HelpKV{
			Key:         Frequency,
			Type:        "duration",
			Description: "time duration between callhome cycles e.g. 24h" + defaultHelpPostfix(Frequency),
			Optional:    true,
		},
	}