fixing 1inch compile issue;

added curve_testing.sol and got it compiled;

contracts/connectors/1inch.sol

@@ -74,7 +74,7 @@ contract OneHelpers is Stores, DSMath {
     /**
      * @dev Return 1proto Address
      */
-    function getOneProtoAddress() internal view returns (address payable) {
+    function getOneProtoAddress() virtual internal view returns (address payable) {
         return payable(OneProtoMappingInterface(getOneProtoMappingAddress()).oneProtoAddress());
     }
 

contracts/connectors/curve_vesting.sol

@@ -0,0 +1,54 @@
+pragma solidity ^0.6.0;
+
+// import files from common directory
+import { Stores } from "../common/stores.sol";
+import { DSMath } from "../common/math.sol";
+import { TokenInterface } from "../common/interfaces.sol";
+
+interface ICurve {
+  function claim(address addr) external;
+}
+
+contract CurveVestingHelpers is Stores, DSMath{
+  /**
+  * @dev Return Curve Token Address
+  */
+  function getCurveTokenAddr() internal pure returns (address) {
+    return 0xD533a949740bb3306d119CC777fa900bA034cd52;
+  }
+
+  /**
+  * @dev Return Curve Vesting Address
+  */
+  function getCurveVestingAddr() internal pure returns (address) {
+    return 0x575CCD8e2D300e2377B43478339E364000318E2c;
+  }
+}
+
+contract CurveVestingProtocol is CurveVestingHelpers {
+  event LogClaim(address sender, uint256 claimable, uint256 getId, uint256 setId);
+
+  /**
+  * @dev Claim Curve DAO Token.
+  * @param sender address of the sender.
+  * @param getId Get token amount at this ID from `InstaMemory` Contract.
+  * @param setId Set token amount at this ID in `InstaMemory` Contract.
+  */
+  function claim(address sender, uint getId, uint setId) external{
+    TokenInterface curveTokenContract = TokenInterface(getCurveTokenAddr());
+    uint initialCurveBal = curveTokenContract.balanceOf(address(this));
+
+    ICurve(getCurveVestingAddr()).claim(address(this));
+
+    uint finalCurveBal = curveTokenContract.balanceOf(address(this));
+
+    uint claimedAmt = sub(finalCurveBal, initialCurveBal);
+
+    setUint(setId, claimedAmt);
+
+    emit LogClaim(address(this), claimedAmt, getId, setId);
+    bytes32 _eventCode = keccak256("LogClaim(address,uint256,uint256,uint256)");
+    bytes memory _eventParam = abi.encode(address(this), claimedAmt, getId, setId);
+    emitEvent(_eventCode, _eventParam);
+  }
+}

contracts/tests/mockOneProto.sol

@@ -1,7 +1,7 @@
 pragma solidity ^0.6.0;
 pragma experimental ABIEncoderV2;
 
-import { ConnectOne } from "../connectors/1proto.sol";
+import { ConnectOne } from "../connectors/1inch.sol";
 
 contract MockConnectOne is ConnectOne {
   address public oneProtoAddr;