The wallet descriptor backing this spkm.
Declared in <wallet/scriptpubkeyman.h>
[[guarded_by(0x7f2e1dcac3a8), guarded_by(0x7f2e111ba5c8), guarded_by(0x7f2e15ef1588), guarded_by(0x7f2e237303e8), guarded_by(0x7f2e26612fa8), guarded_by(0x7f2e2357de98)]]
WalletDescriptor m_wallet_descriptor;