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A constructor for a "typed" deparser
make_deparser(predicate_fun, deparse_fun)
A list; a deparser ready to be dispatched by "type".
A function that takes a "lang" object and return a logical.
A function that takes a "lang" object and return a character string.
str(make_deparser(predicate_fun = rlang::is_call, deparse_fun = deparse))
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