/* */ 
var $ = require('./_');
module.exports = function(it) {
  var keys = $.getKeys(it),
      getSymbols = $.getSymbols;
  if (getSymbols) {
    var symbols = getSymbols(it),
        isEnum = $.isEnum,
        i = 0,
        key;
    while (symbols.length > i)
      if (isEnum.call(it, key = symbols[i++]))
        keys.push(key);
  }
  return keys;
};
