import “transition”;
d3_transitionPrototype.transition = function() {
var id0 = this.id, id1 = ++d3_transitionId, subgroups = [], subgroup, group, node, transition; for (var j = 0, m = this.length; j < m; j++) { subgroups.push(subgroup = []); for (var group = this[j], i = 0, n = group.length; i < n; i++) { if (node = group[i]) { transition = Object.create(node.__transition__[id0]); transition.delay += transition.duration; d3_transitionNode(node, i, id1, transition); } subgroup.push(node); } } return d3_transition(subgroups, id1);
};