def on_done(self):
        if self._d:
            self._d.callback(self)
            self._d = None
Send the blank line ending the MIME headers.
dataset/ETHPy150Open couchbase/couchbase-python-client/txcouchbase/bucket.py/BatchedRowMixin.on_done--crossover with--dataset/ETHPy150Open kleientertainment/ds_mod_tools/pkg/win32/Python27/Lib/BaseHTTPServer.py/BaseHTTPRequestHandler.end_headers