If your code module is a large number of lines, the ability to integrate the code into the blocks would be convenient. The code block can not use the "Process Control - Goto", but it is possible within a block of code.
You can also add the ability to protect from editing some blocks (the lock icon in the second half of the image).
Note: I used the "Wait (loop)" to draw an example - there is an old icon.
Example:
