/scratch/workspace/artdaq-demo-v2_09_03/SLF6/s47-e10-debug/build/artdaq_node_server/v1_00_07/src/node_modules/xml2js/node_modules/xmlbuilder/node_modules/lodash/flatMap.js
function duplicate(n) { return [n, n]; }
_.flatMap([1, 2], duplicate); // => [1, 1, 2, 2]