def write_out(self, f):
vf = None
if isinstance(f, basestring):
vf = VersionedOutputFile(f)
f = vf.as_file()
# Header
f.write('v {0} {1}\n'.format(self._gschver, self._filever))
# Write Elements
for element in self._elements:
element.write_out(f)
if vf:
vf.close()
