[GAS] protect all sheets

gistfile1.txt

function protectAllSheets() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var shs = ss.getSheets();
  var me = Session.getEffectiveUser();
  for (var i = 0; i < shs.length; i++){
    var sheet = shs[i]
    var protection = sheet.protect().setDescription('protect sheet by "function protectAllSheets()"');
    protection.addEditor(me);
    protection.removeEditors(protection.getEditors());
    if (protection.canDomainEdit()) {
      protection.setDomainEdit(false);
    }
  }
}