How to get type parameters of revit family type?

I am trying to create a list of all type parameters using ironpython hosted by pyrevit. I tried following code

from pyrevit import revit, DB

doc =__revit__.ActiveUIDocument.Document
curview = doc.ActiveView

target_category = DB.BuiltInCategory.OST_StructuralColumns
elements = DB.FilteredElementCollector(doc, curview.Id)\
        .OfCategory(target_category)\
        .WhereElementIsNotElementType()\
        .ToElements()

for ele in elements:
    parameters = [i.Definition.Name for i in ele.Parameters]
    orderedParas = [i.Definition.Name for i in ele.GetOrderedParameters()]

print(sorted(parameters))
print(sorted(orderedParas))

Both ele.Parameters and ele.GetOrderedParameters() could only produce instance parameters.

I have read that instance parameters are type parameters for elements. So i tried to catch family types and applied same code as above.

families =   DB.FilteredElementCollector(revit.doc)\
            .OfClass(DB.FamilyInstance)

for family in families:
        x = family.GetOrderedParameters()
        if family.Name == "C2 300x600":
            for i in x:
                print(i.Definition.Name)

Unfortunately above code also could produce only instance parametets

Any help in solving this is deeply appreciated

After some more searching i stumbled upon this post How to access all the family types through revit API? which thankfully had keys to my question

from pyrevit import revit, DB

doc =__revit__.ActiveUIDocument.Document

target_category = DB.BuiltInCategory.OST_StructuralColumns
elements = DB.FilteredElementCollector(doc)\
        .OfCategory(target_category)\
        .WhereElementIsElementType()\
        .ToElements()

for ele in elements:
    for i in ele.GetOrderedParameters():
        print(i.Definition.Name)

It appears i had to use .WhereElementIsElementType() instead of .WhereElementIsNotElementType() to tap into type properties of Revit family