@Override
    public String getValue(Function rowObject, Settings settings, Program pgm, 
	        ServiceProvider serviceProvider) throws IllegalArgumentException {
		Function function = rowObject;
		String stringDepth = "UNK";
		int depth = function.getStackPurgeSize();
		switch (depth) {
		case Function.INVALID_STACK_DEPTH_CHANGE:
		    stringDepth = "INV";
		    break;
		case Function.UNKNOWN_STACK_DEPTH_CHANGE:
		    stringDepth = "UNK";
		    break;
		default:
		    if (depth < 0) {
		        stringDepth = "-" + Integer.toHexString(-depth);
		    } else {
		        stringDepth = Integer.toHexString(depth);
		    }
		}
		return stringDepth;
	}
This table field displays the Function Purge for either the program location or the address
associated with a row in the table.
Ghidra/Features/Base/src/main/java/ghidra/util/table/field/FunctionPurgeTableColumn.java