upgrade.txt

=== 4.5 Onwards ===

This file has been replaced by UPGRADING.md. See MDL-81125 for further information.

===
This files describes API changes in /mod/chat/*,
information provided here is intended especially for developers.

=== 3.3.2 ===

* chat_refresh_events() Now takes two additional parameters to refine the update to a specific instance. This function
  now optionally takes the module instance object or ID, and the course module object or ID. Please try to send the full
  objects instead of the ids to save DB calls.

=== 2.4 ===

optional - no changes needed:
* previous references to icons c/user and c/group have been renamed to i/user and i/group.