sustain/src/main/java/net/happyonroad/component/container/support/DefaultComponentLoader.java
public void quickUnload(Component component) {
        if (component.isAggregating()) {
            logger.trace("Remove aggregating component {}", component);
            loadedFeatures.remove(component);
        } else if (component.isPlain()) {
            logger.trace("Remove plain component {}", component);
            loadedFeatures.remove(component);
        } else {
            if (isUnloading(component)) return;
            long start = System.currentTimeMillis();
            unloading(component);
            logger.info("Unloading {}", component);
            for (FeatureResolver resolver : reverseResolvers) {
                if (resolver.hasFeature(component)) {
                    resolver.release(component);
                }
            }
            loadedFeatures.remove(component);
            unloaded(component);
            logger.info("Unloaded  {} ({})", component, formatDurationHMS(System.currentTimeMillis() - start));
        }
    }
public void quickUnload(Component component) {
        if (component.isAggregating()) {
            logger.trace("Remove aggregating component {}", component);
            loadedFeatures.remove(component);
        } else if (component.isPlain()) {
            logger.trace("Remove plain component {}", component);
            loadedFeatures.remove(component);
        } else {
            if (isUnloading(component)) return;
            long start = System.currentTimeMillis();
            unloading(component);
            logger.info("Unloading {}", component);
            for (FeatureResolver resolver : reverseResolvers) {
                if (resolver.hasFeature(component)) {
                    resolver.release(component);
                }
            }
            loadedFeatures.remove(component);
            unloaded(component);
            logger.info("Unloaded  {} ({})", component, formatDurationHMS(System.currentTimeMillis() - start));
        }
    }
实际卸载一个组件

@param component 被卸载的组件