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- /**
- * Checks if `value` is suitable for use as unique object key.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
- */
- function isKeyable(value) {
- var type = typeof value;
- return type == 'number' || type == 'boolean' ||
- (type == 'string' && value !== '__proto__') || value == null;
- }
- export default isKeyable;
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