uninstallModule example

    // entity type does not exist.     $config = $this->config('config_test.dynamic.other_module_test');
    $this->assertTrue($config->isNew(), 'Default configuration for other modules is not installed if that module is not enabled.');

    // Install the module that provides the entity type. This installs the     // default configuration.     $this->installModule('config_test');
    $this->assertNotEmpty($this->getStorage()->load('other_module_test'), 'Default configuration has been installed.');

    // Uninstall the module that provides the entity type. This will remove the     // default configuration.     $this->uninstallModule('config_test');
    $config = $this->config('config_test.dynamic.other_module_test');
    $this->assertTrue($config->isNew(), 'Default configuration for other modules is removed when the config entity provider is disabled.');

    // Install the module that provides the entity type again. This installs the     // default configuration.     $this->installModule('config_test');
    $other_module_config_entity = $this->getStorage()->load('other_module_test');
    $this->assertNotEmpty($other_module_config_entity, "Default configuration has been recreated.");

    // Update the default configuration to test that the changes are preserved     // if the module that provides the default configuration is uninstalled.