* @return The content of the resource file as a string
     * @throws IOException If an I/O error occurs or the resource is not found
     */
    public static String loadJsonResource(final String resourcePath) throws IOException {
        return loadJsonResource(resourcePath, Collections.emptyMap());
    }

    /**
     * Loads a JSON resource file from the classpath with placeholder substitution.
     *

 */
public class SettingsResourceLoaderTest {

    @Test
    public void testLoadJsonResource_existingResource() throws IOException {
        String content = SettingsResourceLoader.loadJsonResource("suggest_indices/suggest_settings.json");

        assertNotNull(content);
        assertTrue(content.length() > 0);
        assertTrue(content.contains("number_of_shards"));
    }