### Question:
KubernetesUtils { public static boolean isBlank(String str) { int strLen; if (str != null && (strLen = str.length()) != 0) { for (int i = 0; i < strLen; ++i) { if (!Character.isWhitespace(str.charAt(i))) { return false; } } return true; } else { return true; } }  static void writeToFile(String context, String outputFileName); static void writeToFile(Path outputDir, String context, String fileSuffix); static byte[] readFileContent(Path targetFilePath); static void copyFileOrDirectory(String source, String destination); static void printInfo(String msg); static void printError(String msg); static void printDebug(String msg); static void printWarning(String message); static void printInstruction(String msg); static void deleteDirectory(Path path); static boolean isBlank(String str); static String resolveValue(String value); static List<String> getList(BLangExpression expr); static Map<String, String> getMap(BLangExpression expr); static boolean getBooleanValue(BLangExpression expr); static long getLongValue(BLangExpression expr); static int getIntValue(BLangExpression expr); static String getStringValue(BLangExpression expr); static String getValidName(String name); static DeploymentBuildExtension parseBuildExtension(BLangExpression buildExtensionValue); static Map<String, EnvVarValueModel> getEnvVarMap(BLangExpression envVarValues); static Set<String> getImagePullSecrets(BLangRecordLiteral.BLangRecordKeyValueField keyValue); static Set<CopyFileModel> getExternalFileMap(BLangRecordLiteral.BLangRecordKeyValueField keyValue); static List<EnvVar> populateEnvVar(Map<String, EnvVarValueModel> envMap); static List<BLangRecordLiteral.BLangRecordKeyValueField> convertRecordFields(
            List<BLangRecordLiteral.RecordField> fields); static AnnotationAttachmentNode createAnnotation(String annotationName);  }### Answer:
@Test public void isBlankTest() { Assert.assertTrue(KubernetesUtils.isBlank("")); Assert.assertTrue(KubernetesUtils.isBlank(" ")); Assert.assertTrue(KubernetesUtils.isBlank(null)); Assert.assertFalse(KubernetesUtils.isBlank("value")); }