} catch (Exception e) {
            throw new AssertionError(e);
        }
    }

    // Helper to set private flag 'treeAcquired'
    private static void setTreeAcquired(SmbTreeConnection c, boolean val) {
        try {
            Field f = SmbTreeConnection.class.getDeclaredField("treeAcquired");
            f.setAccessible(true);
            f.set(c, val);
        } catch (Exception e) {

                return;
            }
            final boolean wasAcquired = this.treeAcquired;
            log.debug("Switching tree");
            if (t != null) {
                log.debug("Acquired tree on switch " + t);
                t.acquire();
                this.treeAcquired = true;
            } else {
                this.treeAcquired = false;
            }

            this.tree = t;