LZMA_VERSION

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
package extern (C) nothrow @nogc
static if(BOTAN_HAS_LZMA)
enum LZMA_VERSION = (LZMA_VERSION_MAJOR * 10000000U + LZMA_VERSION_MINOR * 10000U + LZMA_VERSION_PATCH * 10U + LZMA_VERSION_STABILITY);

Meta