ctx.topic = null;
ctx.subscriptions = null;
const result = template(ctx, config);
ctx.topic = null;
ctx.subscriptions = null;
const result = template(ctx, config);
delete ctx.subscriptions;
const result = template(ctx, config);
delete ctx.subscriptions;
const result = template(ctx, config);
ctx.subscriptions = [{}, {}, {}];
const result = template(ctx, config);
ctx.subscriptions = [{}, {}, {}];
const result = template(ctx, config);