class = new \ReflectionClass( static::class );
		$properties = $class->getProperties( \ReflectionProperty::IS_PUBLIC | \ReflectionProperty::IS_PROTECTED );
		foreach ( $properties as $property ) {
			$doc_block = $property->getDocComment();
			if ( ! stristr( $doc_block, '@defender_property' ) ) {
				continue;
			}
			$this->annotations[ $property->getName() ] = [
				'type' => $this->parse_annotations_var( $doc_block ),
				'sanitize' => $this->parse_annotation_sanitize( $doc_block ),
				'rule' => $this->parse_annotation_rule( $doc_block ),
			];
		}
	}

	/**
	 * Get the variable type.
	 *
	 * @param $docblock
	 *
	 * @return bool|string
	 */
	private function parse_annotations_var( $docblock ) {
		$pattern = '/@var\s(.+)/';
		if ( preg_match( $pattern, $docblock, $matches ) ) {
			$type = trim( $matches[1] );

			// Only allow right type.
			if ( in_array(
				$type,
				[ 'boolean', 'bool', 'integer', 'int', 'float', 'double', 'string', 'array', 'object' ],
				true
			) ) {
				return $type;
			}
		}

		return false;
	}

	/**
	 * Get the sanitize function.
	 *
	 * @param $docblock
	 *
	 * @return bool|string
	 */
	private function parse_annotation_sanitize( $docblock ) {
		$pattern = '/@(sanitize_.+)/';
		if ( preg_match( $pattern, $docblock, $matches ) ) {
			return trim( $matches[1] );
		}

		return false;
	}

	/**
	 * Get the validation rule.
	 *
	 * @param $docblock
	 *
	 * @return bool|string
	 */
	private function parse_annotation_rule( $docblock ) {
		$pattern = '/@(rule_.+)/';
		if ( preg_match( $pattern, $docblock, $matches ) ) {
			return trim( $matches[1] );
		}

		return false;
	}

	/**
	 * Add a log for internal use, mostly for debug.
	 *
	 * @param string $message
	 * @param string $category
	 *
	 * @return void
	 */
	protected function log( $message, $category = '' ): void {
		if ( ! is_string( $message ) || is_array( $message ) || is_object( $message ) ) {
			$message = print_r( $message, true );
		}

		$this->internal_logging[] = date( 'Y-m-d H:i:s' ) . ' ' . $message;// phpcs:ignore
		// Uncomment it for detailed logging on wp cli.
		// if ( 'cli' === PHP_SAPI ) {
		// echo $message . PHP_EOL;
		// }

		$message = '[' . date( 'c' ) . '] ' . $message . PHP_EOL;// phpcs:ignore

		if ( $this->has_method( 'get_log_path' ) ) {
			if ( ! empty( $category ) && 0 === preg_match( '/\.log$/', $category ) ) {
				$category .= '.log';
			}

			$file_path = $this->get_log_path( $category );
			$dir_name = pathinfo( $file_path, PATHINFO_DIRNAME );

			if ( ! is_dir( $dir_name ) ) {
				wp_mkdir_p( $dir_name );
			}

			if ( is_writable( $dir_name ) ) {
				file_put_contents( $file_path, $message, FILE_APPEND );
			}
		}
	}
}