code: @GwtIncompatible("Resources")
    public static SafeStyleSheet fromResource(
        Class<?> contextClass, @CompileTimeConstant final String resourceName, Charset charset)
        throws IOException {
      return create(Resources.toString(Resources.getResource(contextClass, resourceName), charset));
    }
docs: Creates a SafeStyleSheet from the given compile-time constant {@code resourceName} using
  the given {@code charset}.
  
  <p>This performs ZERO VALIDATION of the data. We assume that resources should be safe because
  they are part of the binary, and therefore not attacker controlled.
  
  @param contextClass Class relative to which to load the resource.