Method IsOptional

src/rpc/util.cpp:707–714

}

bool RPCArg::IsOptional() const
{
    if (m_fallback.index() != 0) {
        return true;
    } else {
        return RPCArg::Optional::NO != std::get<RPCArg::Optional>(m_fallback);
    }
}

std::string RPCArg::ToDescriptionString() const
{