This is the top layer of the cache hierarchy - it keeps as many coins in memory as can fit per the dbcache setting.
Declared in <validation.h>
[[guarded_by(0x7f95139b7298), guarded_by(0x7f9501ef6318), guarded_by(0x7f952537d0e8), guarded_by(0x7f95150ff638)]]
std::unique_ptr<CCoinsViewCache> m_cacheview;