this.requirement = requirement;
    }

    public String getImplementation() {
        return implementation;
    }

    public void setImplementation(String implementation) {
        this.implementation = implementation;
    }

    public String getSince() {
        return since;
    }

    public void setSince(String since) {

 - if required and null squawk

      <configuration>
        <attached implementation="boolean" default-value="true"/>
        <localRepository implementation="org.apache.maven.artifact.repository.ArtifactRepository">${localRepository}</localRepository>
        <resources implementation="java.util.List">${project.resources}</resources>
        <repositories implementation="java.util.List">${project.repositories}</repositories>

 * under the License.
 */
package org.apache.maven.cli.logging;

/**
 * Interface for configuration operations on loggers, which are not available in slf4j, then require per-slf4f-binding
 * implementation.
 *
 * @since 3.1.0
 */
public interface Slf4jConfiguration {
    /**
     * Level
     */
    enum Level {
        DEBUG,
        INFO,
        ERROR
    }

    /**

     *
     * @param parser The XML parser
     * @return Name of the custom implementation; otherwise {@code null}
     */
    private static String parseImplementation(final XmlPullParser parser) {
        return parser.getAttributeValue(null, "implementation");
    }

    /**
     * Attempts to load the named implementation, uses default implementation if no name is given.

      <implementation>org.apache.maven.artifact.manager.WagonB</implementation>
    </component>
    <component>
      <role>org.apache.maven.wagon.Wagon</role>
      <role-hint>c</role-hint>
      <implementation>org.apache.maven.artifact.manager.WagonC</implementation>
    </component>
    <component>
      <role>org.apache.maven.wagon.Wagon</role>
      <role-hint>string</role-hint>

* Logging Implementation

 Maven 3.1.0 ships bundled with {{{https://www.slf4j.org/api/org/slf4j/simple/SimpleLogger.html}SLF4J simple logger}} and since 3.5.0 {{{../maven-slf4j-provider/}Maven-customized <<<maven-slf4j-provider>>>}},
 but is ready to use other logging implementations: SLF4J is responsible for loading the implementation, referred to as

   with its <<<DefaultModelValidator>>> implementation
   ({{{./xref/org/apache/maven/model/validation/DefaultModelValidator.html}source}})

   ** model normalization - merge duplicates: <<<ModelNormalizer>>> ({{{./apidocs/org/apache/maven/model/normalization/ModelNormalizer.html}javadoc}}),
   with its <<<DefaultModelNormalizer>>> implementation

        super("Goal: " + goal + " already exists in the plugin descriptor for prefix: " + goalPrefix
                + System.lineSeparator() + "Existing implementation is: " + existingImplementation
                + System.lineSeparator() + "Conflicting implementation is: " + newImplementation);
    }

 * under the License.
 */
package org.apache.maven.internal.transformation;

/**
 * Exception that may be thrown by the {@link org.apache.maven.artifact.Artifact#getFile()}
 * implementation.
 */
public class TransformationFailedException extends RuntimeException {

    public TransformationFailedException(Throwable cause) {
        super(cause);
    }

          <implementation>java.lang.String</implementation>
          <required>false</required>
          <editable>true</editable>
          <description>parameter-description</description>
          <deprecated>deprecated-parameter</deprecated>
          <since>3.0.0</since>
        </parameter>
      </parameters>
      <configuration>