if (parameters.contains(parameter)) {
            throw new DuplicateParameterException(parameter.getName()
                    + " has been declared multiple times in mojo with goal: " + getGoal() + " (implementation: "
                    + getImplementation() + ")");
        }

        parameters.add(parameter);
    }

    /**

        if (scopes.put(scopeAnnotation, scope) != null) {
            throw new DIException(
                    "Cannot rebind scope annotation class to a different implementation: " + scopeAnnotation);
        }
        return this;
    }

    public <U> Injector bindInstance(Class<U> clazz, U instance) {
        Key<?> key = Key.of(clazz, ReflectionUtils.qualifierOf(clazz));

 * This class in particular may spontaneously self-combust and be replaced by a plexus-compliant thread aware
 * logger implementation at any time.
 *
 * @since 3.0
 */
@SuppressWarnings({"SynchronizationOnLocalVariableOrMethodParameter"})
public class ThreadOutputMuxer {
    private final Iterator<ProjectSegment> projects;

     * Returns the plugin context for given key ({@link PluginDescriptor#getPluginLookupKey()} and
     * {@link MavenProject}, never returns {@code null} as if context not present, creates it.
     *
     * <strong>Implementation note:</strong> while this method return type is {@link Map}, the returned map instance
     * implements {@link ConcurrentMap} as well.
     *
     */

  of required artifacts and other classpath elements, this is assumed by the
  mojo API to be in a correct state, and will be handled by the Wagon
  modifications.


* Implementation Notes

** Accessibility of offline status

  Offline status should be indicated in the MavenSettings instance, since it
  can conceivably be set from either the settings.xml or the command-line.

import java.util.Arrays;
import java.util.Deque;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.Properties;

/**
 * <p>
 * Generic implementation of version comparison.
 * </p>
 * <p>
 * Features:
 * <ul>
 * <li>mixing of '<code>-</code>' (hyphen) and '<code>.</code>' (dot) separators,</li>

    /**
     * Returns the plugin context for mojo being executed and the specified
     * {@link Project}, never returns {@code null} as if context not present, creates it.
     *
     * <strong>Implementation note:</strong> while this method return type is {@link Map}, the
     * returned map instance implements {@link java.util.concurrent.ConcurrentMap} as well.
     *

    private final ProjectsSelector projectsSelector = new DefaultProjectsSelector(projectBuilder);

    // Not using mocks for these strategies - a mock would just copy the actual implementation.

    private final ModelLocator modelLocator = new DefaultModelLocator();
    private final PomlessCollectionStrategy pomlessCollectionStrategy = new PomlessCollectionStrategy(projectBuilder);

        /**
         * Interpolate the value read from the xpp3 document
         * @param source The source value
         * @param fieldName A description of the field being interpolated. The implementation may use this to
         *                           log stuff.
         * @return The interpolated value.
         */
        String transform(String source, String fieldName);
    }

    /**

     * same class realm is used to load build extensions and load mojos for extensions=true plugins.
     * </p>
     * <strong>Note:</strong> This is part of internal implementation and may be changed or removed without notice
     *
     * @since 3.3.0
     */
    public static final String KEY_EXTENSIONS_REALMS = DefaultMavenPluginManager.class.getName() + "/extensionsRealms";