Displaying image message from network

i have gone through previous issues regarding same problem. But none of them clearly provides a way to do this. I have existing Model where I am adding Chatto for UI so I am able to create a message with placeholder but unable to figure out the best way to change the same after download.

Even if i update the model message and perform chatDataSourceDidUpdate(self) it's not reflected.

My another question is what's the best way to access MessageViewModel at run time and is it a good idea.

Start with the existing Model, the chatDataSourceDidUpdate(self) callback, and the MessageViewModel access path mentioned in the issue. Reproduce the placeholder-to-downloaded-image update and determine the supported runtime update flow; done means the image refreshes in the chat and the MessageViewModel access approach is clearly established.

Written by the indexing model from the issue text.