code: public Cache delete(String resource, boolean caseInsensitive) {
  		logger.debug("deleting all files named according to '{}' (case insensitive)", resource);
  		storage.delete(resource, caseInsensitive);
  		return this;
  	}
docs: Deletes all resource that match the given resource name criteria.
  
  @param resource
  the resource name.
  @param caseInsensitive
  whether the resource name comparison should be
  case insensitive.
  @return
  the cache itself, for method chaining.