How to get the elements inside a boundingbox?

Revit
19 
import clr
clr.AddReference('RevitAPI')
clr.AddReference('System')
clr.AddReference('RevitNodes')
clr.AddReference('RevitServices')
import Revit
import RevitServices
from Autodesk.Revit.DB import *
from System.Collections.Generic import List
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)
doc = DocumentManager.Instance.CurrentDBDocument

#Functions for list handling
def ProcessList(_func, _list):
   return map( lambda x: ProcessList(_func, x) if type(x)==list else _func(x), _list )

#Preparing input from dynamo to revit

def ToRevit(item):
	return item.ToRevitType(True)

if isinstance(IN[0], list):
	bblist = ProcessList(ToRevit, IN[0])
else:
	bblist = [ToRevit(IN[0])]

def collectElementsInBB(bb):
	outline = Outline(bb.Min, bb.Max)
	filter = BoundingBoxIntersectsFilter(outline)
	collector = FilteredElementCollector(doc, doc.ActiveView.Id).WherePasses(filter)
	return [e.ToDSType(True) for e in collector]

OUT = ProcessList(collectElementsInBB, bblist)
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