Add the given BidiFlow as the next step in a bidirectional transformation pipeline. By convention protocol stacks are growing to the left: the right most is the bottom layer, the closest to the metal. {{{ +----------------------------+ | Resulting BidiFlow | | | | +------+ +------+ | I1 ~~> | | ~O1~> | | ~~> OO1 | | this | | bidi | | O2 <~~ | | <~I2~ | | <~~ II2 | +------+ +------+ | +----------------------------+ }}} The combine function is used to compose the materialized values of this flow and that flow into the materialized value of the resulting BidiFlow.

public BidiFlow<TIn1, TOut12, TIn21, TOut2, TMat> AtopMat<TOut12, TIn21, TMat2, TMat3>(
	BidiFlow<TOut1, TOut12, TIn21, TIn2, TMat2> bidi,
	Func<TMat, TMat2, TMat3> combine
)

member AtopMat : 
        bidi : BidiFlow<'TOut1, 'TOut12, 'TIn21, 'TIn2, 'TMat2> * 
        combine : Func<'TMat, 'TMat2, 'TMat3> -> BidiFlow<'TIn1, 'TOut12, 'TIn21, 'TOut2, 'TMat>