Hi,

The documentation of syntax-local-lift-require 
<https://docs.racket-lang.org/reference/stxtrans.html#(def._((quote._~23~25kernel)._syntax-local-lift-require))>
 says 
that "If raw-require-spec and stx are part of the input to a transformer, 
then typically syntax-local-introduce should be applied to each before 
passing them to syntax-local-lift-require, and then syntax-local-introduce 
should be applied to the result of syntax-local-lift-require. Otherwise, 
marks added by the macro expander can prevent access to the new imports." 
But the two applications of "syntax-local-introduce" to "stx" will just 
cancel each other, so what's the purpose of applying 
"syntax-local-introduce" to "stx"?

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