Function vldb_sqlite_tokenize_result_get_token 

#[unsafe(no_mangle)]
pub extern "C" fn vldb_sqlite_tokenize_result_get_token(
    handle: *mut VldbSqliteTokenizeResultHandle,
    index: u64,
) -> *mut c_char

返回指定下标的词元字符串。 Return the token string at the specified index.