code: Set<PolicyNodeImpl> getPolicyNodesExpected(int depth,
          String expectedOID, boolean matchAny) {
  
          if (expectedOID.equals(ANY_POLICY)) {
              return getPolicyNodes(depth);
          } else {
              return getPolicyNodesExpectedHelper(depth, expectedOID, matchAny);
          }
      }
docs: Finds all nodes at the specified depth whose expected_policy_set
  contains the specified expected OID (if matchAny is false)
  or the special OID "any value" (if matchAny is true).
  
  @param depth an int representing the desired depth
  @param expectedOID a String encoding the valid OID to match
  @param matchAny a boolean indicating whether an expected_policy_set
  containing ANY_POLICY should be considered a match
  @return a Set of matched <code>PolicyNode</code>s