contract SupportsInterfaceWithLookup is ERC165 {
	  bytes4 public constant InterfaceId_ERC165 = 0x01ffc9a7;
	  /**
	   * 0x01ffc9a7 ===
	   *   bytes4(keccak256('supportsInterface(bytes4)'))
	   */

	  /**
	   * @dev a mapping of interface id to whether or not it's supported
	   */
	  mapping(bytes4 => bool) internal supportedInterfaces;

	  /**
	   * @dev A contract implementing SupportsInterfaceWithLookup
	   * implement ERC165 itself
	   */
	  constructor()
		public
	  {
		_registerInterface(InterfaceId_ERC165);
	  }

	  /**
	   * @dev implement supportsInterface(bytes4) using a lookup table
	   */
	  function supportsInterface(bytes4 _interfaceId)
		external
		view
		returns (bool)
	  {
		return supportedInterfaces[_interfaceId];
	  }

	  /**
	   * @dev private method for registering an interface
	   */
	  function _registerInterface(bytes4 _interfaceId)
		internal
	  {
		require(_interfaceId != 0xffffffff);
		supportedInterfaces[_interfaceId] = true;
	  }
	}
/**
 	 * @title SupportsInterfaceWithLookup
 	 * @author Matt Condon (@shrugs)
 	 * @dev Implements ERC165 using a lookup table.
 	 */
function _registerInterface(bytes4 _interfaceId)
		internal
	  {
		require(_interfaceId != 0xffffffff);
		supportedInterfaces[_interfaceId] = true;
	  }
/**
 	   * @dev private method for registering an interface
 	   */