sqlite3_vfs 1471 ext/sqlite3/libsqlite/sqlite3.c typedef struct sqlite3_vfs sqlite3_vfs; sqlite3_vfs 1473 ext/sqlite3/libsqlite/sqlite3.c struct sqlite3_vfs { sqlite3_vfs 924 ext/sqlite3/libsqlite/sqlite3.h typedef struct sqlite3_vfs sqlite3_vfs; sqlite3_vfs 926 ext/sqlite3/libsqlite/sqlite3.h struct sqlite3_vfs {