src.data_sources.annuity.product.gmwbΒΆ Namespace for annuity GMWB rider assumptions. Classes GmwbRider(path) Namespace for annuity GMWB rider assumptions. Modules src.data_sources.annuity.product.gmwb.benefit Data source for GMWB benefits. src.data_sources.annuity.product.gmwb.charge Data source for the GMWB charge rate.