Minecraft wiki entry for Block_update, associated text: 1 Java Edition
1.1 Priorities
1.2 PP update
1.2.1 Sending
1.2.2 Receiving
1.3 NC update
1.3.1 Sending
1.3.2 Receiving
1.4 Comparator update
1.5 Special blocks
1.6 Block updates and DFS
1.7 Self update
2 Bedrock Edition
3 History