}

    /**
     * Gets the fields that can be searched against.
     *
     * @return array of field names that can be searched
     */
    public String[] getSearchFields() {
        return searchFields;
    }

    /**
     * Sets the fields that can be searched against.
     * Also updates the searchFieldSet for O(1) lookup performance.
     *

        // Verify search fields are initialized
        assertNotNull(queryFieldConfig.getSearchFields());
        assertTrue(queryFieldConfig.getSearchFields().length > 0);
        assertEquals(QueryFieldConfig.INURL_FIELD, queryFieldConfig.getSearchFields()[0]);

        // Verify facet fields are initialized
        assertNotNull(queryFieldConfig.getFacetFields());