public function get_field_slug() {
		if ( preg_match( '/\[|\]/', $this->slug ) ) {
			$slug = preg_replace( '/\[|\]/', '.', $this->slug );
			$slug = str_replace( '..', '.', $slug );
			return substr( $slug, 0, -1 );
		}

		return $this->slug;
	}