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@babel/runtime-corejs2

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babel's modular runtime helpers with core-js@2 polyfilling

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import _Object$getOwnPropertyNames from "core-js/library/fn/object/get-own-property-names.js"; import _Object$getOwnPropertyDescriptor from "core-js/library/fn/object/get-own-property-descriptor.js"; import _Object$defineProperty from "core-js/library/fn/object/define-property.js"; export default function _defaults(obj, defaults) { var keys = _Object$getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = _Object$getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { _Object$defineProperty(obj, key, value); } } return obj; }