AbstractHandlerMethodMapping中的SCOPED_TARGET_NAME_PREFIX 是干嘛用的？

Question

请问：
String SCOPED_TARGET_NAME_PREFIX = "scopedTarget.";这个前缀是什么情况下才会使用？

public abstract class AbstractHandlerMethodMapping<T> extends AbstractHandlerMapping implements InitializingBean {

    /**
     * Bean name prefix for target beans behind scoped proxies. Used to exclude those
     * targets from handler method detection, in favor of the corresponding proxies.
     * <p>We're not checking the autowire-candidate status here, which is how the
     * proxy target filtering problem is being handled at the autowiring level,
     * since autowire-candidate may have been turned to {@code false} for other
     * reasons, while still expecting the bean to be eligible for handler methods.
     * <p>Originally defined in {@link org.springframework.aop.scope.ScopedProxyUtils}
     * but duplicated here to avoid a hard dependency on the spring-aop module.
     */
    private static final String SCOPED_TARGET_NAME_PREFIX = "scopedTarget.";