Function indyrs::cache::_get_cred_def

pub fn _get_cred_def(
    command_handle: CommandHandle, 
    pool_handle: PoolHandle, 
    wallet_handle: WalletHandle, 
    submitter_did: &str, 
    id: &str, 
    options_json: &str, 
    cb: Option<ResponseStringCB>
) -> ErrorCode