update_request library Null safety

1. sendbird_sdk
2. update_request library

sendbird_sdk package

1. Libraries
2. admin_message
3. api_client
4. api_request
5. app_info
6. apple_critical_alert_options
7. application_user_list_request
8. async_operation
9. async_queue
10. authenticate_event_handler
11. banned_user_list_query
12. banned_user_list_request
13. base_channel
14. base_event
15. base_message
16. base_message_fetch_params
17. base_message_internal
18. base_message_params
19. base_query
20. blocked_user_list_query
21. blocked_user_list_request
22. cache_service
23. cache_utils
24. cached_data
25. cached_data_map
26. channel_event
27. channel_event_handler
28. channel_invitation_preference_request
29. channel_my_mute_info_get_request
30. channel_reaction_add_request
31. channel_reaction_remove_request
32. channel_report_request
33. channel_user_ban_request
34. channel_user_mute_request
35. channel_user_unban_request
36. channel_user_unmute_request
37. command
38. command_manager
39. command_type
40. connection_event_handler
41. connection_manager
42. contants
43. create_request
44. create_request
45. create_request
46. delete_request
47. delete_request
48. delete_request
49. delivery_status
50. do_not_disturb_request
51. emoji
52. emoji_category_request
53. emoji_container_request
54. emoji_request
55. enums
56. error
57. error_code
58. event_manager
59. extensions
60. file_info
61. file_message
62. file_message_params
63. file_message_resend_request
64. file_message_send_request
65. file_message_update_request
66. file_upload_request
67. get_request
68. get_request
69. group_channel
70. group_channel_accept_request
71. group_channel_change_log_request
72. group_channel_change_logs_params
73. group_channel_count_preference_request
74. group_channel_count_request
75. group_channel_create_request
76. group_channel_decline_request
77. group_channel_delete_request
78. group_channel_delivery_request
79. group_channel_filters
80. group_channel_freeze_request
81. group_channel_hide_request
82. group_channel_internal
83. group_channel_invite_request
84. group_channel_join_request
85. group_channel_leave_request
86. group_channel_list_query
87. group_channel_list_request
88. group_channel_member_list_query
89. group_channel_params
90. group_channel_push_trigger_option_request
91. group_channel_read_request
92. group_channel_refresh_request
93. group_channel_reset_history_request
94. group_channel_screen_shot_request
95. group_channel_total_unread_channel_count_params
96. group_channel_total_unread_message_count_params
97. group_channel_typing_request
98. group_channel_update_request
99. http_client
100. info_update_request
101. isolate_bridge_def
102. isolate_bridge_master
103. isolate_bridge_slave
104. json_from_parser
105. logger
106. login_event
107. mack_request
108. mcnt_event
109. member
110. member_list_request
111. memory_cache_service
112. message_change_log_get_request
113. message_change_logs_params
114. message_copy_request
115. message_delete_request
116. message_event
117. message_get_request
118. message_list_params
119. message_meta_array_request
120. message_report_request
121. message_retrieval_params
122. message_search_query
123. message_search_request
124. message_translate_request
125. messages_get_request
126. meta_array
127. muted_user_list_query
128. muted_user_list_request
129. og_image
130. og_interfaces
131. og_meta_data
132. open_channel
133. open_channel_create_request
134. open_channel_delete_request
135. open_channel_enter_request
136. open_channel_exit_request
137. open_channel_list_query
138. open_channel_list_request
139. open_channel_params
140. open_channel_refresh_request
141. open_channel_update_request
142. operator_add_request
143. operator_list_query
144. operator_list_request
145. operator_remove_request
146. options
147. parsers
148. participant_list_query
149. participant_list_request
150. pin_create_request
151. pin_delete_request
152. policy
153. poll
154. poll_changelogs_get_request
155. poll_changelogs_params
156. poll_close_request
157. poll_create_request
158. poll_data
159. poll_delete_request
160. poll_get_request
161. poll_handler
162. poll_list_get_request
163. poll_list_query
164. poll_list_query_params
165. poll_option
166. poll_option_add_request
167. poll_option_delete_request
168. poll_option_get_list_voters_request
169. poll_option_get_request
170. poll_option_handler
171. poll_option_retrieval_params
172. poll_option_update_request
173. poll_params
174. poll_retrieval_params
175. poll_update_event
176. poll_update_params
177. poll_update_request
178. poll_vote_event
179. poll_vote_request
180. poll_voter_list_query
181. poll_voter_list_query_params
182. previous_message_list_query
183. public_group_channel_list_query
184. public_group_channel_list_request
185. push_register_request
186. push_sound_request
187. push_template_request
188. push_trigger_option_request
189. push_unregister_request
190. reaction
191. reaction_event
192. read_status
193. reconnect_configuration
194. reconnect_task
195. responses
196. restricted_user
197. scheduled_file_message
198. scheduled_file_message_params
199. scheduled_file_message_request
200. scheduled_file_message_send_request
201. scheduled_file_message_update_params
202. scheduled_file_message_update_request
203. scheduled_info
204. scheduled_message_cancel_request
205. scheduled_message_get_list_request
206. scheduled_message_get_request
207. scheduled_message_list_params
208. scheduled_message_list_query
209. scheduled_message_retrieval_params
210. scheduled_message_send_now_request
211. scheduled_message_total_count_params
212. scheduled_message_total_count_request
213. scheduled_user_message
214. scheduled_user_message_params
215. scheduled_user_message_request
216. scheduled_user_message_send_request
217. scheduled_user_message_update_params
218. scheduled_user_message_update_request
219. sendbird_sdk
220. sendbird_sdk_accessor
221. sendbird_sdk_api
222. sendbird_sdk_internal
223. sendbird_sdk_streams
224. sender
225. session_event
226. session_event_handler
227. session_key_update_request
228. session_manager
229. session_token_issue_request
230. session_token_revoke_request
231. snooze_request
232. state
233. string_utils
234. thread_info
235. thread_info_update_event
236. threaded_message_list_params
237. types
238. typing_status
239. unread_channel_count_request
240. unread_count_info
241. unread_item_count
242. unread_item_count_request
243. unread_message_count_request
244. update_request
245. update_request
246. update_request
247. user
248. user_block_request
249. user_event
250. user_event_handler
251. user_list_query
252. user_list_query
253. user_message
254. user_message_params
255. user_message_resend_request
256. user_message_send_request
257. user_message_update_request
258. user_report_request
259. user_unblock_request
260. websocket_client
261. ws_event
262. ws_request