The wallet descriptor backing this spkm.
Declared in <wallet/scriptpubkeyman.h>
[[guarded_by(0x7fbc763111b8), guarded_by(0x7fbc81287fd8), guarded_by(0x7fbc7d507028), guarded_by(0x7fbc96777718), guarded_by(0x7fbc846b17b8), guarded_by(0x7fbc8dc010d8)]]
WalletDescriptor m_wallet_descriptor;