@SuppressWarnings("unchecked")
    public SUBCLASS setDestination(String destination) {
        this.destination = destination;
        return (SUBCLASS)this;
    }
Sets the name of the recipient of this invocation.
<p>
This is either a query feature name
("query(feature)"), or a schema and field name concatenated by a dot ("schema.field").
linguistics/src/main/java/com/yahoo/language/process/InvocationContext.java