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  "source": "pragma solidity ^0.4.24;\n\nimport \"zos-lib/contracts/Initializable.sol\";\nimport \"../Roles.sol\";\n\n\ncontract PauserRole is Initializable {\n  using Roles for Roles.Role;\n\n  event PauserAdded(address indexed account);\n  event PauserRemoved(address indexed account);\n\n  Roles.Role private pausers;\n\n  function initialize(address sender) public initializer {\n    if (!isPauser(sender)) {\n      _addPauser(sender);\n    }\n  }\n\n  modifier onlyPauser() {\n    require(isPauser(msg.sender));\n    _;\n  }\n\n  function isPauser(address account) public view returns (bool) {\n    return pausers.has(account);\n  }\n\n  function addPauser(address account) public onlyPauser {\n    _addPauser(account);\n  }\n\n  function renouncePauser() public {\n    _removePauser(msg.sender);\n  }\n\n  function _addPauser(address account) internal {\n    pausers.add(account);\n    emit PauserAdded(account);\n  }\n\n  function _removePauser(address account) internal {\n    pausers.remove(account);\n    emit PauserRemoved(account);\n  }\n\n  uint256[50] private ______gap;\n}\n",
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