040000 tree 244546801f2a13e863b635ea39b00f16de6b7c7d	BinaryCombineFn Lambda
040000 tree ae909c1a06bb0dd0ea0dd8fe0fd232f0df16f0f2	BinaryCombineFn
040000 tree 0b7bc06acd06497381932cf87e5079ddee4e902b	Combine PerKey
040000 tree 138ddda16695dc527ac8b833ea12ec45b7c5ec24	CombineFn
040000 tree 58e1835f52580551141642bde575c89ce61d9acf	Simple Function