How do I escape the - character in an expression rule? We want to write som

How do I escape the - character in an expression rule?
We want to write something like:
...
local!cookie:local!tokenResult.headers.Set-Cookie
...
but it confuses - in Set-Cookie with the minus sign.

The Set-Cookie is an http header in an http get and we have no control over this name.

OriginalPostID-158189

OriginalPostID-158189

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