all files / contracts/legacy/ Migrations.sol

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pragma solidity 0.6.2;
 
contract Migrations {
    address public owner;
    uint public last_completed_migration;
 
    constructor() public {
        owner = msg.sender;
    }
 
    modifier restricted() {
        if (msg.sender == owner) _;
    }
 
    function setCompleted(uint completed) public restricted {
        last_completed_migration = completed;
    }
 
    function upgrade(address new_address) public restricted {
        Migrations upgraded = Migrations(new_address);
        upgraded.setCompleted(last_completed_migration);
    }
}