protected String getPrefixForStringData(Data data, Address dataAddress, int diff, DataType dt) {
		if (data.hasStringValue()) {
			int len = data.getLength();
			return dt.getDefaultOffcutLabelPrefix(data, data, len, options.displayOptions, diff);
		}
		return null;
	}
Generate label string.  This may serve two use cases:
<ul>
<li>Generating operand label at markupAddress for referenced instruction and offcutAddress</li>
<li>Generating offcut label for an offcutAddress with instruction (markupAddress=null)</li>
</ul>
@param offcutAddress address for which generated label represents
@param instruction instruction containing offcut address
@param markupAddress address where a label will be referenced from (may be null)
@return generated offcut label
Ghidra/Features/Base/src/main/java/ghidra/program/model/listing/CodeUnitFormat.java