text: import '../global-constructors.js';
  
  const toIterator= value=>
  	value === null || value === undefined? [][Symbol.iterator]():
  	value instanceof GeneratorFunction? value():
  	value[Symbol.iterator]? value[Symbol.iterator]():
  	[ value, ][Symbol.iterator]()
  ;
  
  Reflect.defineProperty( GeneratorFunction, 'toIterator', { value:toIterator, }, );
  