clean up the API some more, to avoid duplicate storage for remote repositories, eliminate the resulting simplistic wrapper around the local repository, then use the MavenSession as a better local-repository wrapper that can also supply caches and online/offline flags in 3.x without the need to change the API further.
maven/shared/trunk/maven-artifact-resolver/pom.xml
maven/shared/trunk/maven-artifact-resolver/src/main/java/org/apache/maven/artifact/