@edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "MS_EXPOSE_REP",
      justification = "immutable")
  public static Collection<String> getSuperUsers() {
    return superUsers;
  }
Check if the current user is a super user
@return true if current user is a super user, false otherwise.
@param user to check
hbase-common/src/main/java/org/apache/hadoop/hbase/security/Superusers.java