code: @Override
  	public boolean isCacheable() {
  		boolean supportsConditionals = has("Last-Modified", this.response) || has("ETag", this.response);
  		boolean isCacheable =
  				has("Cache-Control", "s-maxage", this.response)
  				|| has("Cache-Control", "max-age", this.response)
  				|| has("Expires", this.response);
  		return supportsConditionals || isCacheable;
  	}
docs: /* (non-Javadoc)
  @see com.gistlabs.mechanize.cache.InMemoryCacheEntry#isCacheable()