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I am trying to create a crowdsale contract using zeppelin. But i am facing following errors.

CrowdSale.sol:6:46: DeclarationError: Identifier not found or not unique.
contract EdCoinCrowdSale is CappedCrowdSale, RefundableCrowdSale {
                                             ^-----------------^
CrowdSale.sol:24:51: DeclarationError: Undeclared identifier.
    function setCrowdsaleStage(uint value) public onlyOwner {
                                                  ^-------^

I have imported contract using import.

import "node_modules/zeppelin-solidity/contracts/crowdsale/distribution/RefundableCrowdSale.sol";

I have looked at other solutions but i am still facing above mentioned errors.

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For future reference, this was unfortunately just a typo. I hope you found this quickly.
It is RefundableCrowdsale not RefundableCrowdSale

For information on using OpenZeppelin Crowdsales, please see the documentation: https://docs.openzeppelin.org/v2.3.0/crowdsales

If you have any questions on using OpenZeppelin you can always ask in the community forum

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