checkRef         55048 ext/sqlite3/libsqlite/sqlite3.c     if( checkRef(pCheck, iPage, zContext) ) break;
checkRef         55073 ext/sqlite3/libsqlite/sqlite3.c           checkRef(pCheck, iFreePage, zContext);
checkRef         55141 ext/sqlite3/libsqlite/sqlite3.c   if( checkRef(pCheck, iPage, zParentContext) ) return 0;