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import {selector} from "d3-selection";
import {Transition} from "./index.js";
import schedule, {get} from "./schedule.js";
export default function(select) {
var name = this._name,
id = this._id;
if (typeof select !== "function") select = selector(select);
for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
if ("__data__" in node) subnode.__data__ = node.__data__;
subgroup[i] = subnode;
schedule(subgroup[i], name, id, i, subgroup, get(node, id));
}
}
}
return new Transition(subgroups, this._parents, name, id);
}