library(histry)
stopifnot(inherits(get("evaluate_call", asNamespace("evaluate")), "functionWithTrace"))
evaltracer(FALSE)
stopifnot(!inherits(get("evaluate_call", asNamespace("evaluate")),"functionWithTrace"))
evaltracer(TRUE)
stopifnot(inherits(get("evaluate_call", asNamespace("evaluate")), "functionWithTrace"))
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