@Override
	public String getValueAsString(KeyedObject o) {
		try {
			return Long.toString(getValue(o));
		}
		catch (ghidra.util.exception.NoValueException exc) {
			return "0";
		}
	}
Return the attribute of the specified KeyedObject as a String.
Ghidra/Framework/Generic/src/main/java/ghidra/util/graph/attributes/LongAttribute.java