New branch: phpng <> pecl install

Maybe I have missed something, but I saw that Michael Wallner added new branches phpng to the Propro and Raphf extensions. I can imagine this is the easiest way for an extension maintainer, but how will users deal with this? Will there be a way do do something like 'pecl install -b phpng propro'? Or, better yet, will 'pecl install propro' automatically install a 'phpng' branch (if it exists) and it is installing the extension for phpng? -- Jan