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rOACCT/node_modules/core-js/internals/get-async-iterator-flattenable.js
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get-async-iterator-flattenable.js
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			var call = require('../internals/function-call');
			var isCallable = require('../internals/is-callable');
			var anObject = require('../internals/an-object');
			var getIteratorDirect = require('../internals/get-iterator-direct');
			var getIteratorMethod = require('../internals/get-iterator-method');
			var getMethod = require('../internals/get-method');
			var wellKnownSymbol = require('../internals/well-known-symbol');
			var AsyncFromSyncIterator = require('../internals/async-from-sync-iterator');

			var ASYNC_ITERATOR = wellKnownSymbol('asyncIterator');

			module.exports = function from(obj) {
			var object = anObject(obj);
			var alreadyAsync = true;
			var method = getMethod(object, ASYNC_ITERATOR);
			var iterator;
			if (!isCallable(method)) {
			method = getIteratorMethod(object);
			alreadyAsync = false;
			}
			if (isCallable(method)) {
			iterator = call(method, object);
			} else {
			iterator = object;
			alreadyAsync = true;
			}
			anObject(iterator);
			return getIteratorDirect(alreadyAsync ? iterator : new AsyncFromSyncIterator(getIteratorDirect(iterator)));
			};