public function test_appendMetadata()
 {
     $currentMetadata = 'hello-';
     $newMessage = 'newMessage';
     $this->sut->setMetadata($currentMetadata);
     $this->sut->appendMetadata($newMessage);
     $this->assertEquals($currentMetadata . $newMessage, $this->sut->getMetadata());
 }
 public function validate()
 {
     return $this->basicInfo->validate() && $this->objectBlob->validate();
 }
 public function toArray()
 {
     return [self::BASIC_INFO => $this->basicInfo->toArray(), self::BLOB => $this->blob->toArray()];
 }