GraphAware\Neo4j\OGM\Metadata\PropertyAnnotationMetadata::isNullable PHP Method

    public function isNullable()
    {
        return $this->nullable;
    }

 public function testNotNullableCanBeDefined()
 {
     $metadata = new PropertyAnnotationMetadata('string', null, false);
     $this->assertFalse($metadata->isNullable());
 }