}
                }
                throw new FessSystemException("unknown");
            }

            @Override
            protected boolean isTargetPluginVersion(final String version) {
                return true;
            }
        };
    }

    @Test
    public void test_processRepository1() {

        if (num > 0) {
            return num;
        }
        return Runtime.getRuntime().availableProcessors();
    }

    String getPluginVersionFilter();

    default boolean isTargetPluginVersion(final String version) {
        final Pattern pattern;
        if (StringUtil.isBlank(getPluginVersionFilter())) {