def collapse(self):
if len(self._views) == 1:
result = self._views[0]
else:
data = _ffi.new("uint8_t[]", self._total_length)
pos = 0
for view in self._views:
_lib.memcpy(data + pos, view._data, len(view))
pos += len(view)
result = Buffer(data, self._total_length).view()
del self._views[:]
self._total_length = 0
return result
