The wallet descriptor backing this spkm.
Declared in <wallet/scriptpubkeyman.h>
[[guarded_by(0x7fd7419bb028), guarded_by(0x7fd7453dba38), guarded_by(0x7fd73d792738), guarded_by(0x7fd745b55588), guarded_by(0x7fd75f7ec578), guarded_by(0x7fd738e43a98)]]
WalletDescriptor m_wallet_descriptor;