@Target(value={TYPE,METHOD}) @Retention(value=RUNTIME) @Documented @Conditional(value=org.springframework.boot.autoconfigure.web.OnEnabledResourceChainCondition.class) public @interface ConditionalOnEnabledResourceChain
@Conditional that checks whether or not the Spring resource
 handling chain is enabled. Matches if
 WebProperties.Resources.Chain.getEnabled() is true or if
 webjars-locator-core is on the classpath.