cascading.flow.hadoop
Classes 
FlowMapper
FlowReducer
HadoopCoGroupClosure
HadoopFlow
HadoopFlowConnector
HadoopFlowProcess
HadoopFlowStep
HadoopGroupByClosure
MapReduceFlow
MapReduceFlowStep
ProcessFlow
Enums 
HadoopCoGroupClosure.Spill