@Override
    public Boolean get() throws InterruptedException, ExecutionException {
        boolean ret = Boolean.TRUE;
        for (Future<Boolean> op : operands) {
            if (!op.get()) {
                ret = Boolean.FALSE;
            }
        }
        return ret;
    }
<p>Adds a {@link CompletableFuture} to this conjunction. This can be called at any time, even after having called
{@link #get()} previously.</p>

@param operand The operand to add to this conjunction.
jdisc_core/src/main/java/com/yahoo/jdisc/handler/FutureConjunction.java