Neos\ContentRepository\Domain\Model\NodeType::isAbstract PHP Method

    public function isAbstract()
    {
        return $this->abstract;
    }

 /**
  * @param string $nodeTypeName
  * @param NodeType $nodeType
  * @return void
  */
 protected function readNodeTypeConfiguration($nodeTypeName, NodeType $nodeType)
 {
     $nodeTypeConfiguration = $nodeType->getFullConfiguration();
     $this->superTypeConfiguration['typo3:' . $nodeTypeName] = array();
     /** @var NodeType $superType */
     foreach ($nodeType->getDeclaredSuperTypes() as $superType) {
         $this->superTypeConfiguration['typo3:' . $nodeTypeName][] = 'typo3:' . $superType->getName();
     }
     $nodeTypeProperties = array();
     if (isset($nodeTypeConfiguration['properties'])) {
         foreach ($nodeTypeConfiguration['properties'] as $property => $propertyConfiguration) {
             // TODO Make sure we can configure the range for all multi column elements to define what types a column may contain
             $this->addProperty('typo3:' . $nodeTypeName, 'typo3:' . $property, $propertyConfiguration);
             $nodeTypeProperties[] = 'typo3:' . $property;
         }
     }
     $metadata = array();
     $metaDataPropertyIndexes = array('ui');
     foreach ($metaDataPropertyIndexes as $propertyName) {
         if (isset($nodeTypeConfiguration[$propertyName])) {
             $metadata[$propertyName] = $nodeTypeConfiguration[$propertyName];
         }
     }
     if ($nodeType->isAbstract()) {
         $metadata['abstract'] = true;
     }
     $this->types['typo3:' . $nodeTypeName] = (object) array('label' => $nodeType->getLabel() ?: $nodeTypeName, 'id' => 'typo3:' . $nodeTypeName, 'properties' => array(), 'specific_properties' => $nodeTypeProperties, 'subtypes' => array(), 'metadata' => (object) $metadata, 'supertypes' => $this->superTypeConfiguration['typo3:' . $nodeTypeName], 'url' => 'http://www.typo3.org/ns/2012/Flow/Packages/Neos/Content/', 'ancestors' => array(), 'comment' => '', 'comment_plain' => '');
 }