### Question:
EC2TemplateOptions extends TemplateOptions implements Cloneable { public String getClientToken() { return clientToken; }  @Override EC2TemplateOptions clone(); @Override void copyTo(TemplateOptions to); @Override boolean equals(Object o); @Override int hashCode(); @Override ToStringHelper string(); EC2TemplateOptions securityGroups(String... groupNames); EC2TemplateOptions securityGroups(Iterable<String> groupNames); EC2TemplateOptions userData(byte[] unencodedData); EC2TemplateOptions keyPair(String keyPair); EC2TemplateOptions noKeyPair(); EC2TemplateOptions mapEBSSnapshotToDeviceName(String deviceName, String snapshotId,
         @Nullable Integer sizeInGib, boolean deleteOnTermination); EC2TemplateOptions mapEBSSnapshotToDeviceName(String deviceName, String snapshotId,
                                                        @Nullable Integer sizeInGib, boolean deleteOnTermination,
                                                        @Nullable String volumeType, @Nullable Integer iops,
                                                        boolean encrypted); EC2TemplateOptions mapNewVolumeToDeviceName(String deviceName, int sizeInGib, boolean deleteOnTermination); EC2TemplateOptions mapNewVolumeToDeviceName(String deviceName, int sizeInGib, boolean deleteOnTermination,
                                                      @Nullable String volumeType, @Nullable Integer iops,
                                                      boolean encrypted); EC2TemplateOptions mapEphemeralDeviceToDeviceName(String deviceName, String virtualName); EC2TemplateOptions unmapDeviceNamed(String deviceName); EC2TemplateOptions blockDeviceMappings(Iterable<? extends BlockDeviceMapping> blockDeviceMappings); EC2TemplateOptions maxCount(Integer maxCount); EC2TemplateOptions clientToken(String clientToken); @Override EC2TemplateOptions blockOnPort(int port, int seconds); @Override EC2TemplateOptions inboundPorts(int... ports); @Override EC2TemplateOptions authorizePublicKey(String publicKey); @Override EC2TemplateOptions installPrivateKey(String privateKey); @Override EC2TemplateOptions blockUntilRunning(boolean blockUntilRunning); @Override EC2TemplateOptions dontAuthorizePublicKey(); @Override EC2TemplateOptions nameTask(String name); @Override EC2TemplateOptions runAsRoot(boolean runAsRoot); @Override EC2TemplateOptions runScript(Statement script); @Override EC2TemplateOptions overrideLoginCredentials(LoginCredentials overridingCredentials); @Override EC2TemplateOptions overrideLoginPassword(String password); @Override EC2TemplateOptions overrideLoginPrivateKey(String privateKey); @Override EC2TemplateOptions overrideLoginUser(String loginUser); @Override EC2TemplateOptions overrideAuthenticateSudo(boolean authenticateSudo); @Override EC2TemplateOptions userMetadata(Map<String, String> userMetadata); @Override EC2TemplateOptions userMetadata(String key, String value); @Override EC2TemplateOptions nodeNames(Iterable<String> nodeNames); @Override EC2TemplateOptions networks(Iterable<String> networks); @Override EC2TemplateOptions runScript(String script); @Override EC2TemplateOptions tags(Iterable<String> tags); @Override EC2TemplateOptions wrapInInitScript(boolean wrapInInitScript); @Override EC2TemplateOptions blockOnComplete(boolean blockOnComplete); Set<String> getGroups(); String getKeyPair(); boolean shouldAutomaticallyCreateKeyPair(); byte[] getUserData(); Set<BlockDeviceMapping> getBlockDeviceMappings(); int getMaxCount(); String getClientToken(); static final EC2TemplateOptions NONE; }### Answer:
@Test public void testClientTokenDefault() { EC2TemplateOptions options = new EC2TemplateOptions(); assertNull(options.getClientToken()); }