'Adjust the given ``uri`` based on the calling ``filename``.
When this method is called from the runtime, the
``filename`` parameter is taken directly to the ``filename``
attribute of the calling template. Therefore a custom
:class:`.TemplateCollection` subclass can place any string
identifier desired in the ``filename`` parameter of the
:class:`.Template` objects it constructs and have them come back
here.'

def adjust_uri(self, uri, filename):

    return uri
