Function rocks_sys::rocks_db_get_approximate_memtable_stats_cf

pub unsafe extern "C" fn rocks_db_get_approximate_memtable_stats_cf(
    db: *mut rocks_db_t, 
    column_family: *mut rocks_column_family_handle_t, 
    range_start_ptr: *const c_char, 
    range_start_len: usize, 
    range_limit_ptr: *const c_char, 
    range_limit_len: usize, 
    count: *mut u64, 
    size: *mut u64
)