How to inline/extract subsystem contents in Simulink programmatically

What i would like to do is to extract the contents of a subsystem deleting the subsystem itself.

I know this can be done in system composer using inlineComponent()

but i found no way in Simulink to perform such action. I know the existence of Simulink.SubSystem.copyContentsToBlockDiagram but it only works if the target block diagram is empty, which is not the case.

For example (the simulink is a dummy model):

This is the structure, the red one is the subsystem i would like to inline

this is the content of the subsystem

this is the result of the extaction (the port connection will be performed after and i actually already implemented it)

EDIT: i would really like to avoid looping through the subsystem blocks and copy them one by one since then reconnecting in the correct order them would be a real pain.

Answer 1

[Luca Ferro]

I found the solution to this, i'll keep the question just because it can be useful for someone in need of the same function since i found no other thread with a proper solution about this topic.

The function to use is quite hidden in the documentation and is:

Simulink.BlockDiagram.expandSubsystem

it is incredibly good since it also manages the inport/ouport connection by itself