如何使用量角器返回这个复选框元素?

I'm writing a Typescript/Protractor test that needs to both evaluate and select checkbox elements on a grid. These checkboxes lack IDs. Since I can get a handle on input elements that reside on the same row as these checkboxes, I'm attempting to get them via a combination of element finders (by.id, by.xpath, and by.css). But my attempts are failing.I'm writing a Typescript/Protractor test that n