Former-commit-id: 6a065cd049e29d7184a3aa1454de0fe1855e9941
implement switchOff methode tidy up code and add doxy comments Former-commit-id: a162e2aae756f8b74b8e65f08740c00f3c820e50
Former-commit-id: 4076e6ec2860ceaa53fdd07c47c40e45f2329de9