eris-keys/node_modules/ramda/src/internal/_functionName.js

a JavaScript client library for eris-keys

module.exports = function _functionName(f) {
  // String(x => x) evaluates to "x => x", so the pattern may not match.
  var match = String(f).match(/^function (\w*)/);
  return match == null ? '' : match[1];
};