@Override
    public boolean isCandidateClass(Class<?> c) {
      return !classFilter.isCandidateClass(c);
    }
A class that finds a set of classes that are locally accessible (from .class or .jar files), and
satisfy the conditions that are imposed by name and class filters provided by the user.
hbase-common/src/test/java/org/apache/hadoop/hbase/ClassFinder.java