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rOACCT/node_modules/thunky/promise.js
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promise.js
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			module.exports = thunkyp

			function thunkyp (fn) {
			let running = null

			return ready

			function ready () {
			if (running) return running
			const p = fn()
			if (!(p instanceof Promise)) running = Promise.resolve(p)
			else running = p
			running.catch(onerror)
			return running
			}

			function onerror () {
			running = null
			}
			}