GIT_REF_FORMAT_ALLOW_ONELEVEL

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
version(!GIT_DEPRECATE_HARD)
extern (C) nothrow @nogc deprecated
enum GIT_REF_FORMAT_ALLOW_ONELEVEL = libgit2_d.refs.git_reference_format_t.GIT_REFERENCE_FORMAT_ALLOW_ONELEVEL;

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