function getEngineTuple(tuples) {
  if (!isEdge()) {
    return tuples[1];
  }
  for (let i = 0; i < tuples.length; i++) {
    const tuple = tuples[i];
    if (tuple[0] == 'Edge') {
      return tuple;
    }
  }
}
@param {!Array<!Array<string>>} tuples Extracted version tuples.
@return {!Array<string>|undefined} The engine tuple or undefined if not
    found.