11       guard let db = openDatabase(dbName: dbName) else {  in definition()  variable
24         return executeSql(sql: sql, with: args, for: db, readOnly: readOnly)  in definition()
73     var db: OpaquePointer?  in openDatabase()  variable
81       db = cachedDatabases[dbName]  in openDatabase()
84     if db == nil {  in openDatabase()
86       if sqlite3_open(path.absoluteString, &db) != SQLITE_OK {  in openDatabase()
90       cachedDatabases[dbName] = db  in openDatabase()
92     return db  in openDatabase()
95 …private func executeSql(sql: String, with args: [Any], for db: OpaquePointer, readOnly: Bool) -> […  in executeSql()
102     if sqlite3_prepare_v2(db, sql, -1, &statement, nil) != SQLITE_OK {  in executeSql()
103       return [convertSqlLiteErrorToString(db: db)]  in executeSql()
151         error = convertSqlLiteErrorToString(db: db)  in executeSql()
157       rowsAffected = sqlite3_changes(db)  in executeSql()
159         insertId = sqlite3_last_insert_rowid(db)  in executeSql()
206   private func convertSqlLiteErrorToString(db: OpaquePointer?) -> String {  in convertSqlLiteErrorToString()
207     let code = sqlite3_errcode(db)  in convertSqlLiteErrorToString()
208     let message = NSString(utf8String: sqlite3_errmsg(db)) ?? ""  in convertSqlLiteErrorToString()