sqlite3WalUndo   41550 ext/sqlite3/libsqlite/sqlite3.c # define sqlite3WalUndo(x,y,z)                   0
sqlite3WalUndo   51463 ext/sqlite3/libsqlite/sqlite3.c SQLITE_PRIVATE int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx){