public function getContentType(LayoutBlockInterface $layoutBlock = null)
	{
		if (is_null($layoutBlock) || !$classType = $layoutBlock->getClassType()) {
			if ($this->contentType) {
				return $this->contentType;
			}

			$contentTypes = $this->getContentTypes();

			$classType = $contentTypes[0]['class'];
		}

		return $classType;
	}