text: const noop = () => {};
  const isFn = a => typeof a === 'function';
  
  const {
      isArray
  } = Array;
  
  const maybeFn = a => isFn(a) ? a : noop;
  const maybeEmptyArray = a => !a ? [] : a;
  const maybeArray = a => isArray(a) ? a : [a];
  fn([
      maybeArray(b),
      maybeEmptyArray(c),
      maybeFn(b),
  ]);
  
  