code: function getDependentKeys(node, doUnique) {
    var _doUnique = !!doUnique;
    var keys = o.has(node, "arguments") ? node.arguments.map(function (arg) {
      return arg.value;
    }).filter(function (value) {
      return "string" === typeof value;
    }) : null;
    return keys && _doUnique ? keys.filter(_onlyUnique) : keys;
  }
docs: Get list of dependent keys for computed property or observer
  Should be called after check with <code>isEmberField</code>
  
  @param {ASTNode} node
  @param {boolean} [doUnique] default false
  @returns {string[]|null} list of dependent keys or <code>null</code> if node doesn't not have <code>arguments</code>
  @private