public static function katana_filter( $param = '' ) {
		if ( $param ) {
			$param = trim( $param, ' _' );
			return sprintf( '%s_%s', Config::KATANA_FILTER, $param );
		} else {
			return Config::KATANA_FILTER;
		}
	}
public static function katana_filter( $param = '' ) {
		if ( $param ) {
			$param = trim( $param, ' _' );
			return sprintf( '%s_%s', Config::KATANA_FILTER, $param );
		} else {
			return Config::KATANA_FILTER;
		}
	}
public static function katana_filter ( $ param = '' ) { if ( $ param ) { $ param = trim ( $ param , ' _' ) ; return sprintf ( '%s_%s' , Config :: KATANA_FILTER , $ param ) ; } else { return Config :: KATANA_FILTER ; } }
Creates a specific katana filter based on a param, like a post_id,
a page template name or similar.

@param string $param The suffix of the filter.
@return string KATANA_FILTER by default and adding a suffix is param is provided.
@since 2.0.0
Creates a specific katana filter based on a param like a post_id a page template name or similar .