in src/main/java/org/apache/sling/jcr/base/internal/mount/ProxyWorkspace.java [83:89]
public void copy(String srcAbsPath, String destAbsPath) throws ConstraintViolationException, VersionException, AccessDeniedException, PathNotFoundException, ItemExistsException, LockException, RepositoryException {
if (mountSession.isMount(srcAbsPath) && mountSession.isMount(destAbsPath)) {
delegate2.copy(srcAbsPath, destAbsPath);
} else {
delegate.copy(srcAbsPath, destAbsPath);
}
}