**Requirements**
[] Add a new parameter property to TemplateData called, 'suggestedvalues' in JSON. //Note: on test instance this was titled datalist. We want to make sure that the naming is consistent in the final implementation.//
[] Add field to edit this new property in the TemplateData editor on the parameter properties page underneath the type property. For input, use OOUI widget: MultilineTextInputWidget (autosize). //Should be already done in {T263533}//
[] Give this field a label of: "Suggested values (dropdown)"
[] Separate values by comma (//Review open question: accept multiple comma symbols or use pipes instead??//)
[] Only have this property visible when the following parameter types are selected: Content, Line, String, Unknown, Number.
**Open questions**
- Can we accept multiple comma symbols as separators (RTL languages have a different comma) or should they be separated by pipes? | Can we accept all? What happens when an item includes a comma?