Join parallel (and adjacent) walls

Revit
1

I am trying to find a way to automatically join parallel and adjacent walls (the way Revit’s UI does):
Collegamuri
In a project I’m working on I already have walls which are parallel and adjacent one another, and the only way I managed to join them (even with the UI) is by pretending to stretch a snap point:

Collegamuri2
Collegamuri2.gif382×570 168 KB

Is there a way with dynamo/python/revit api to do this?
I already tried the Hot Gear package and the variations of the LocationCurve.JoinType property but this is just for walls that join at an angle (image)
The “Join” command does not work in the Revit UI and so it does not in python.
I tried to disallow and then allow the WallJoins both in the Revit UI and in python but nothing…
I also tried the AutoJoinElements but still no luck. This last option is my best hope to get something working (link)

import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

# Import DocumentManager and TransactionManager
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
app = uiapp.Application

# Import RevitAPI
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *

#INPUTS
bool=IN[0]
if bool:
	TransactionManager.Instance.EnsureInTransaction(doc)
	doc.AutoJoinElements()
	TransactionManager.Instance.TransactionTaskDone()
	ext="done?"
else:
	ext="not done?"
OUT=ext

image