public X509TestContext get(X509KeyType caKeyType, X509KeyType certKeyType, char[] keyPassword) {
    return ctxs.getUnchecked(new CacheKey(caKeyType, certKeyType, keyPassword));
  }
Will cache X509TestContext to speed up tests.
hbase-common/src/test/java/org/apache/hadoop/hbase/io/crypto/tls/X509TestContextProvider.java