this is just a marker file....

 * prior notice.
 *
 */
public interface ProjectRealmCache {

    /**
     * A cache key.
     */
    interface Key {
        // marker interface for cache keys
    }

    /**
     * CacheRecord
     */
    class CacheRecord {

        public ClassRealm getRealm() {
            return realm;
        }

                    logger.warn("The following goals are not marked as thread-safe in " + project.getName() + ":");
                    for (MojoDescriptor unsafeGoal : unsafeGoals) {
                        logger.warn("  " + unsafeGoal.getId());
                    }
                } else {
                    logger.warn("The following plugins are not marked as thread-safe in " + project.getName() + ":");

This is a marker file to allow the repository to be found in the classpath....

            result.add(executionPlanItem.getMojoExecution());
        }
        return result;
    }

    /**
     * Get set of plugins having a goal/mojo used but not marked @threadSafe
     *
     * @return the set of plugins (without info on which goal is concerned)
     */
    public Set<Plugin> getNonThreadSafePlugins() {
        Set<Plugin> plugins = new HashSet<>();

); public void setValue(String); public void setLine(String); public void setFile(java.io.File); public String[] getParts(); } org/codehaus/plexus/util/cli/Commandline$Marker.class package org.codehaus.plexus.util.cli; public synchronized class Commandline$Marker { private int position; private int realPos; void Commandline$Marker(Commandline, int); public int getPosition(); } org/codehaus/plexus/util/cli/Commandline.class package org.codehaus.plexus.util.cli; public synchronized class Commandline...

); public void setValue(String); public void setLine(String); public void setFile(java.io.File); public String[] getParts(); } org/codehaus/plexus/util/cli/Commandline$Marker.class package org.codehaus.plexus.util.cli; public synchronized class Commandline$Marker { private int position; private int realPos; void Commandline$Marker(Commandline, int); public int getPosition(); } org/codehaus/plexus/util/cli/Commandline.class package org.codehaus.plexus.util.cli; public synchronized class Commandline...

      and issue tracking systems that are managed by, or on behalf of, the
      Licensor for the purpose of discussing and improving the Work, but
      excluding communication that is conspicuously marked or otherwise
      designated in writing by the copyright owner as "Not a Contribution."

      "Contributor" shall mean Licensor and any individual or Legal Entity

    Developer or such Contributor as a result of any such terms You offer.

    3.6. Larger Works.

    You may create a Larger Work by combining Covered Software with
    other code not governed by the terms of this License and distribute
    the Larger Work as a single product. In such a case, You must make
    sure the requirements of this License are fulfilled for the Covered
    Software.

        msgs.add("* Your build is requesting parallel execution, but project      *");
        msgs.add("* contains the following plugin(s) that have goals not marked   *");
        msgs.add("* as @threadSafe to support parallel building.                  *");
        msgs.add("* While this /may/ work fine, please look for plugin updates    *");