return null;
ArrayList<RequireOperation> operations = new ArrayList<RequireOperation>();
RequireTimestamp requireTimestamp = requires.getRequireTimestamp();
if (requireTimestamp != null)
operations.add(new RequireTimestampOperation(requireTimestamp.getMaxAge()));
RequireSignature requireSignature = requires.getRequireSignature();
if (requireSignature != null && (!fault || requireSignature.isIncludeFaults()))
{
List<Target> targets = convertTargets(requireSignature.getTargets());