# @ConditionalOnClass(JsonMapper.class) on a @Bean method, versus on a nested class, with and without Jackson

--- condition on the @Bean method, classpath without any Jackson jar ---
context failed
exception chain: BeanDefinitionStoreException -> IllegalStateException -> NoClassDefFoundError -> ClassNotFoundException
root cause     : java.lang.ClassNotFoundException: tools.jackson.databind.module.SimpleModule

--- condition on a nested class, classpath without any Jackson jar ---
context started; nestedModule bean present: false

--- condition on the @Bean method, classpath with Jackson ---
context started; methodLevelModule bean present: true