Spreadsheet files were shared to G folder copy group members. https://cafe.naver.com/eojji/176

isOpenSharedFileByProp.js

function isOpenSharedFileByProp_() {
  var domain = Session.getEffectiveUser().getEmail().split('@')[1];
  var myDomain = ['gfolder.net', 'eojji.net', 'eojji.kr', 'eojji.com'];
  if (myDomain.indexOf(domain) > -1) {
    console.log('True My Domain: %s', domain);
    return  true;
  } else {
    console.log('False My Domain: %s', domain);
  }
  var ss, ssIdsharedGfolderCopy;
  ssIdsharedGfolderCopy = PropertiesService.getScriptProperties().getProperty('ssIdsharedGfolderCopy');
  try {
    ss = SpreadsheetApp.openById(ssIdsharedGfolderCopy);
    if (ss && ss.getId() == ssIdsharedGfolderCopy) {
      return true;
    } else {
      return false;
    }
  } catch(e) {
    console.error('Catch: %s, %s, SpreadsheetApp.openById: %s', e.name, e.message, ssIdsharedGfolderCopy);
    return false;
  }  
}