Block/Cache/Additional.php
public function getContentTypeOptions()
    {
        $contentTypes = [
            self::CONTENT_TYPE_HTML  => __('HTML'),
            self::CONTENT_TYPE_CSS   => __('CSS'),
            self::CONTENT_TYPE_JS    => __('JavaScript'),
            self::CONTENT_TYPE_IMAGE => __('Images')
        ];
        return $contentTypes;
    }
public function getContentTypeOptions()
    {
        $contentTypes = [
            self::CONTENT_TYPE_HTML  => __('HTML'),
            self::CONTENT_TYPE_CSS   => __('CSS'),
            self::CONTENT_TYPE_JS    => __('JavaScript'),
            self::CONTENT_TYPE_IMAGE => __('Images')
        ];
        return $contentTypes;
    }
public function getContentTypeOptions ( ) { $ contentTypes = [ self :: CONTENT_TYPE_HTML => __ ( 'HTML' ) , self :: CONTENT_TYPE_CSS => __ ( 'CSS' ) , self :: CONTENT_TYPE_JS => __ ( 'JavaScript' ) , self :: CONTENT_TYPE_IMAGE => __ ( 'Images' ) ] ; return $ contentTypes ; }
Get content types as option array

@return array
Get content types as option array