protractor by.repeater how to find sibling elements - protractor

Question

I want to get the text for all the elements where the icon has error (don't want the one with warning) with class="dropdown-item-icon ctp-img-notification-error"
How can I get that?
In this case I only want the text "unable to load Data", since that is an error
<li ng-repeat="option in options" class="dropdown-item ng-scope">
<a href ng-class="{ selected : isSelected(option)}" ng-click="selectItem(option)">
<div data-ng-if="option.iconCls" class=ng-scope">
<div class="dropdown-item-icon ctp-img-notification-error" data-ng-class="options.iconCls"></div>
<div class="ng-binding">unable to load Data</div>
</div>
</a>
<a href ng-class="{ selected : isSelected(option)}" ng-click="selectItem(option)">
<div data-ng-if="option.iconCls" class=ng-scope">
<div class="dropdown-item-icon ctp-img-notification-warning" data-ng-class="options.iconCls"></div>
<div class="ng-binding">using cache Data</div>
</div>
</a>
</li>

Answer 1

My first thought looks like this:
var errorMessages = [];
element.all(by.css('.dropdown-item-icon.ctp-img-notification-error .ng-binding')).then(function(items) {
items.forEach(function(item) {
item.getText().then(function(message) {
errorMessages.push(message);
});
});
});