isBtreeCursor    70922 ext/sqlite3/libsqlite/sqlite3.c   int isBtreeCursor     /* True for B-Tree.  False for pseudo-table or vtab */
isBtreeCursor    70948 ext/sqlite3/libsqlite/sqlite3.c       (isBtreeCursor?sqlite3BtreeCursorSize():0);
isBtreeCursor    70961 ext/sqlite3/libsqlite/sqlite3.c     if( isBtreeCursor ){