Function twolayerOpt

create a default TwolayerOpt

This is a Twolayer that optimally removes crossings between the two layers. Because this is local, it might not fully remove link crossings that decrossOpt will, but it can run on larger dags and will often be faster.

Example

const layout = sugiyama().decross(decrossTwoLayer().order(twolayerOpt()));
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