nl_tokens: / * Given a graph that has had the acyclic operation applied this function undoes that operation . More specifically any edge with the reversed attribute is again reversed to restore the original direction of the edge .
pl_tokens: function undo ( g ) { g . eachEdge ( function ( e , s , t , a ) { if ( a . reversed ) { <mask> a . reversed ; g . delEdge ( e ) ; g . addEdge ( e , t , s , a ) ; } } ) ; }