def put(self, key, value):
check_not_none(key, "<STR_LIT>")<EOL>check_not_none(value, "<STR_LIT>")<EOL>key_data = self._to_data(key)<EOL>value_data = self._to_data(value)<EOL>return self._encode_invoke_on_key(multi_map_put_codec, key_data, key=key_data, value=value_data,<EOL>thread_id=thread_id())<EOL>
Stores a key-value tuple in the multimap.

**Warning: This method uses __hash__ and __eq__ methods of binary form of the key, not the actual implementations
of __hash__ and __eq__ defined in key's class.**

:param key: (object), the key to be stored.
:param value: (object), the value to be stored.
:return: (bool), ``true`` if size of the multimap is increased, ``false`` if the multimap already contains the key-value
tuple.