const threadStore = { ... } // threadStore contents here
const permissionsToRemoveInMigration = [ ... ] // permissionsToRemoveInMigration contents here

const updatedThreadInfos = {};
const threadInfos = threadStore.threadInfos;
for (const threadID in threadInfos) {
  const threadInfo = threadInfos[threadID];
  const { roles } = threadInfo;

  const updatedRoles = {};
  for (const roleID in roles) {
    const role = roles[roleID];
    const { permissions: rolePermissions } = role;
    const updatedPermissions = {};
    for (const permission in rolePermissions) {
        if (!permissionsToRemoveInMigration.includes(permission)) {
            updatedPermissions[permission] = rolePermissions[permission];
        }
    }
    updatedRoles[roleID] = { ...role, permissions: updatedPermissions };
  }
  

  const updatedThreadInfo = {
    ...threadInfo,
    roles: updatedRoles,
  };

  // Nothing should log here (testing: nothing logs)
  for (const roleID in updatedRoles) {
    const role = updatedRoles[roleID];
    const { permissions: rolePermissions } = role;
    for (const permission in rolePermissions) {
      if (permissionsToRemoveInMigration.includes(permission)) {
        console.log('found incorrect permission: ', roleID);
      }
    }
  }

  updatedThreadInfos[threadID] = updatedThreadInfo;
}