ess.beer.io.load.mcstas_choppers# ess.beer.io.load.mcstas_choppers(da, source_position)[source]# Return BEER choppers for the McStas mode in the data. Return type: DiskChoppers[TypeVar(RunType, ess.reduce.nexus.types.SampleRun (int), ess.powder.types.VanadiumRun (int), ess.powder.types.EmptyCanRun (int))]