private static void ensureInit() {
if (ourClassSpecifiedContributors != null) return;
MultiMap<String, NonCodeMembersContributor> contributorMap =
new MultiMap<String, NonCodeMembersContributor>();
for (final NonCodeMembersContributor contributor : EP_NAME.getExtensions()) {
contributorMap.putValue(contributor.getParentClassName(), contributor);
}
Collection<NonCodeMembersContributor> allTypeContributors = contributorMap.remove(null);
ourAllTypeContributors =
allTypeContributors.toArray(new NonCodeMembersContributor[allTypeContributors.size()]);
ourClassSpecifiedContributors = contributorMap;
}
