sol

// soljson-v0.6.1+commit.e6f7d5a4.js
// https://solidity.readthedocs.io/en/v0.6.1/contracts.html#getter-functions

pragma solidity >=0.4.0 <0.7.0;

contract C {
    uint public data;
    function edit() public {
        data = 3; // internal change
    }
    function returnData() public view returns (uint) {
        return this.data(); // external access
    }
}