nl_tokens: / finds last node that is considered as candidate for search ( isCandidate ( node ) === true ) starting from exclusiveStartPosition
pl_tokens: function findRightmostChildNodeWithTokens ( children , exclusiveStartPosition ) { for ( var i = exclusiveStartPosition - 1 ; i >= 0 ; -- i ) { if ( nodeHasTokens ( children [ i ] ) ) { return <mask> [ i ] ; } } }