Escape brackets

Questions
1

I’m trying to print “{” and “}” inside an expression, but I’m not sure how to do it.

I tried:
{{{$node[“Collector”].data[“start_var_date”]}}}

Expected:
{2019-11-27}

But it gives an error.

2

In this case it is probably best to use simple string concatenation like this:

{{'{' + $node["Collector"].data["start_var_date"] + '}'}}
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