A handle for a foldable stroller having a pair of stroller handles includes a foldable bar with lateral ends. The control procedure of the invention determines whether a temporary stop of the fuel cell stack or continuance of the stop of the fuel cell stack leads to potential performance deterioration of the fuel cell stack at a restart of the fuel cell unit. The document manager can generate billing information based on the job information; and transmit the billing information to an application service provider providing a service on the document. A second disclosed method reverses the order of steps and but still forms solid residue by-product. Embodiments may also improve the ability of search engines or search engine indexers to determine the site of origin for such user content.