Like LabelText, but it can be applied to an array/list to change the element label (instead of the label of array/list itself)

1. Ensure you make it a callback: isCallback=true, or the richTextXml starts with $
2. It'll pass the element value and index to your function
3. Return the desired label content from the function

Here is an example of using on an array:

using SaintsField;

[FieldLabelText("
quot; + nameof(ArrayLabels))]
public string[] arrayLabels;

// if you do not care about the actual value, use `object` as the first parameter
private string ArrayLabels(object _, int index) => 
quot;<color=pink>[{(char)('A' + index)}]";