if ( $this->isSubmitAttempt( $request ) ) {
// Checkboxes are just not added to the request arrays if they're not checked,
// so it's perfectly possible for there not to be an entry at all
if ( $this->isSubmitAttempt( $request ) ) {
// Checkboxes are just not added to the request arrays if they're not checked,
// so it's perfectly possible for there not to be an entry at all