/// Accrued amount const visitor module.
/// Cash flow aggregation visitor module.
/// Cash flow compressor const visitor module.
/// Duration const visitor module.
/// Fixing visitor module.
/// Indexing visitor module.
/// NPV by date const visitor module.
/// NPV by tenor const visitor module.
/// NPV const visitor module.
/// Par value visitor module.
/// Par value visitor double rate instrument module.
/// Traits module.
/// Z-spread const visitor module.