private KeyNotFoundException(final String key) {
            super(key);
        }
    }

    @Override
    protected ObjectiveProperties newObjectiveProperties(final String resourcePath, final PropertyFilter propertyFilter) {
        return new ObjectiveProperties(resourcePath) { // for e.g. checking existence and filtering value
            Cache<String, String> cache = CacheBuilder.newBuilder().build();

                propField.setAccessible(true);
                propField.set(this, new org.dbflute.helper.jprop.ObjectiveProperties("test.properties"));
            } catch (Exception e) {
                throw new RuntimeException("Failed to initialize TestFessConfig", e);
            }
        }
    }

                    propField.setAccessible(true);
                    propField.set(this, new org.dbflute.helper.jprop.ObjectiveProperties("test"));
                } catch (Exception e) {
                    throw new RuntimeException("Failed to initialize prop field", e);
                }
            }

            @Override