export const extractArgs = (func: (...args: any[]) => any) => {
  return (func + '')
    .replace(/[/][/].*$/gm, '') // strip single-line comments
    .replace(/\s+/g, '') // strip white space
    .replace(/[/][*][^/*]*[*][/]/g, '') // strip multi-line comments
    .split('){', 1)[0]
    .replace(/^[^(]*[(]/, '') // extract the parameters
    .replace(/=[^,]+/g, '') // strip any ES6 defaults
    .split(',')
    .filter(Boolean); // split & filter [""]
};