code: private ResourceGenerator loadCommonGenerator(String resourcePath) {
  
  		ResourceGenerator generator = null;
  
  		for (Entry<ResourceGeneratorResolver, Class<?>> entry : commonGenerators.entrySet()) {
  			ResourceGeneratorResolver resolver = entry.getKey();
  			if (resolver.matchPath(resourcePath)) {
  				generator = (ResourceGenerator) ClassLoaderResourceUtils.buildObjectInstance(entry.getValue());
  				if (!generator.getResolver().isSameAs(resolver)) {
  					throw new BundlingProcessException("The resolver defined for " + generator.getClass().getName()
  							+ " is different from the one expected by Jawr.");
  				}
  
  				if (resolver.getType().equals(ResolverType.PREFIXED)) {
  					loadGeneratorIfNeeded(resolver.getResourcePath(resourcePath));
  				}
  			}
  		}
  
  		if (generator != null) {
  			initGenerator(generator);
  		}
  
  		return generator;
  	}
docs: Lazy loads generators, to avoid the need for undesired dependencies.
  
  @param generatorKey
  the generator key
  
  @return the resource generator