code: public void quickLoad(Component component) throws Exception {
          if (component.isAggregating()) {
              logger.trace("Needn't real load aggregating component {}", component);
              loadedFeatures.put(component, FeatureResolver.AggregatingFlag);
          } else if (component.isPlain()) {
              logger.trace("Needn't real load plain component {}", component);
              loadedFeatures.put(component, FeatureResolver.PlainFlag);
          } else {
              if (isLoading(component)) return;
              long start = System.currentTimeMillis();
              loading(component);
              ComponentResource resource = component.getResource();
              if (resource == null) {
                  throw new IOException("The component " + component + " without resource");
              }
              logger.info("Loading {}", component);
              List<FeatureResolver> resolvers = new ArrayList<FeatureResolver>(featureResolvers.size());
              for (FeatureResolver featureResolver : featureResolvers) {
                  featureResolver.applyDefaults(component);
                  if (featureResolver.hasFeature(component)) {
                      resolvers.add(featureResolver);
                  }
              }
  
              for (FeatureResolver featureResolver : resolvers) {
                  featureResolver.beforeResolve(component);
              }
              for (FeatureResolver featureResolver : resolvers) {
                  featureResolver.resolve(component);
              }
              for (FeatureResolver featureResolver : resolvers) {
                  featureResolver.afterResolve(component);
              }
              loaded(component);
              logger.info("Loaded  {} ({})", component, formatDurationHMS(System.currentTimeMillis() - start));
          }
      }
docs: 实际卸载一个组件，不考虑依赖情况
  
  @param component 被加载的组件
  @throws IOException 加载过程中的IO错误