dd_xcx/node_modules/@antv/util/esm/union.js

import uniq from './uniq';
var union = function () {
    var sources = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        sources[_i] = arguments[_i];
    }
    return uniq([].concat.apply([], sources));
};
export default union;
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