pub unsafe extern "C" fn rocksdb_block_based_options_set_block_cache(
    block_options: *const DBBlockBasedTableOptionsOpaque, 
    block_cache: *const DBCacheOpaque
)pub unsafe extern "C" fn rocksdb_block_based_options_set_block_cache(
    block_options: *const DBBlockBasedTableOptionsOpaque, 
    block_cache: *const DBCacheOpaque
)