Money Legos- Source not found?

[blockpartines]

pragma solidity ^0.5.0;
pragma experimental ABIEncoderV2;

import "@studydefi/money-legos/dydx/contracts/DydxFlashloanBase.sol";
import "@studydefi/money-legos/dydx/contracts/ICallee.sol";

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

Source not found?