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							- 'use strict';
 
- var callBound = require('call-bound');
 
- var safeRegexTest = require('safe-regex-test');
 
- var toStr = callBound('Object.prototype.toString');
 
- var fnToStr = callBound('Function.prototype.toString');
 
- var isFnRegex = safeRegexTest(/^\s*async(?:\s+function(?:\s+|\()|\s*\()/);
 
- var hasToStringTag = require('has-tostringtag/shams')();
 
- var getProto = require('get-proto');
 
- var getAsyncFunc = require('async-function');
 
- /** @type {import('.')} */
 
- module.exports = function isAsyncFunction(fn) {
 
- 	if (typeof fn !== 'function') {
 
- 		return false;
 
- 	}
 
- 	if (isFnRegex(fnToStr(fn))) {
 
- 		return true;
 
- 	}
 
- 	if (!hasToStringTag) {
 
- 		var str = toStr(fn);
 
- 		return str === '[object AsyncFunction]';
 
- 	}
 
- 	if (!getProto) {
 
- 		return false;
 
- 	}
 
- 	var asyncFunc = getAsyncFunc();
 
- 	return asyncFunc && asyncFunc.prototype === getProto(fn);
 
- };
 
 
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