pub unsafe extern "C" fn rocksdb_delete_range_cf( db: *mut rocksdb_t, options: *const rocksdb_writeoptions_t, column_family: *mut rocksdb_column_family_handle_t, start_key: *const c_char, start_key_len: usize, end_key: *const c_char, end_key_len: usize, errptr: *mut *mut c_char)
