getTimeModified() public method

Returns the last modified time
public getTimeModified ( string $key, boolean $asDateTimeObject = false ) : UNIX
$key string
$asDateTimeObject boolean (Optional) Return as DateTimeObject if true
return UNIX Timestamp or DateTimeObject
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 /**
  * @inheritdoc
  */
 public function getTimeModified($asDateTimeObject = false)
 {
     if ($this->timeModified === null) {
         $this->timeModified = $time = $this->storage->getTimeModified($this->key);
         if ($time) {
             $this->timeModified = $asDateTimeObject ? $this->datetime()->setTimestamp($time) : $time;
         }
     }
     return $this->timeModified;
 }