What problem does this feature solve?

Possibility to add icons into text area, positioned in different corners.
It should work the same way how it works for Input component.

In my specific case I use it to display customized Spin component, during data loading.
This functionality exists in Input, DatePicker, Select. But for some reason it dose not exists in TextArea.

What does the proposed API look like?

<TextArea prefix={} prefixPosition={"top | bottom"} /> <TextArea suffix={} suffixPosition={"top | bottom"} />