RB_INITIALIZER

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C) nothrow @nogc pragma(inline, true) pure nothrow @safe @nogc @live
ROOT
RB_INITIALIZER
(
ROOT
)
(
scope const ROOT* root
)
if (
is(ROOT == struct)
)

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