public void setValue(KeyedObject o, long value) {
		update();
		values.put(o.key(), value);
	}
Set the value of this attribute for the specified KeyedObject.
@param o The KeyedObject that is assigned the value. Should
be a member of the owningSet.
@param value The value to associate with the specified KeyedObject.
Ghidra/Framework/Generic/src/main/java/ghidra/util/graph/attributes/LongAttribute.java