lua_upvaluejoin

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
version(LUA_53_STATIC)
extern (C) @nogc nothrow
void
lua_upvaluejoin
(,
int fidx1
,
int n1
,
int fidx2
,
int n2
)

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