code: function toKey$1(value) {
  	  if (typeof value == 'string' || isSymbol$1(value)) {
  	    return value;
  	  }
  	  var result = (value + '');
  	  return (result == '0' && (1 / value) == -INFINITY$1) ? '-0' : result;
  	}
docs: Converts `value` to a string key if it's not a string or symbol.
  
  @private
  @param {*} value The value to inspect.
  @returns {string|symbol} Returns the key.