def add(self, full_path, node):
path, name = shetpath.split(full_path)
assert name, Exception("Must specify a file.")
directory = self.get_dir(path)
assert name not in directory, Exception(
"Path %s already exists." % full_path)
directory[name] = node
self.on_change("add", full_path)
def remove(self, path):
head, tail = shetpath.split(path)
del self.get_node(head)[tail]
self.on_change("remove", path)
