Method delUse

chapter02/src/main/java/com/seaofnodes/simple/node/Node.java:161–164

( Node use )

    // Return true if the output list is empty afterward.
    // Error is 'use' does not exist; ok for 'use' to be null.
    protected boolean delUse( Node use ) {
        Utils.del(_outputs, Utils.find(_outputs, use));
        return _outputs.size() == 0;
    }

    /**
     * Kill a Node with no <em>uses</em>, by setting all of its <em>defs</em>