TYPEDEF_D2I_OF.TYPEDEF_D2I_OF

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
template TYPEDEF_D2I_OF(string type)
extern (C) nothrow
enum TYPEDEF_D2I_OF = "alias typeof(D2I_OF!(" ~ type ~ ").init) d2i_of_" ~ type ~ ";";

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