How to modify the editor state

[nakolkin]

Checklist

• This is not covered in the repository examples.
• I am using the package latest version.
• This is a bug report or an enhancement proposal.

Description

Is it possible to modify the editor state externally? I'm struggling to find such examples. I implemented TCustomControl to render attachments, I also want to be able to download or to delete such attachment from the mui-rte. Is it feasible?