def load(self, path):
        """
        Load a manifest at path or return a suitable manifest already loaded.
        """
        path = os.path.normpath(path)
        mtime = os.stat(path).st_mtime

        if path not in self or self[path].mtime != mtime:
            manifest = self.build(path)
            self[path] = self.manifest_mod(manifest, mtime)

        return self[path].manifest

        Load a manifest at path or return a suitable manifest already loaded.
        
src/pkg_resources/__init__.py