Python Create Operator Path With Filter

[DJDhrub]

n = hou.node("/path/to/node")
g = n.parmTemplateGroup()
p = hou.StringParmTemplate("test", "Test", 1)
g.append(p)
n.setParmTemplateGroup(g)

So, the above code creates the first image, without the floating panel type chooser.

 

What I like to create is the second one. One with camera filter and other with geo filters. Can someone help me with it? didn't find anything so far, or may be looking in the wrong place.

Ignore the Label. Looking for some help here.

this is my first post, so!! 

[DJDhrub]

found the answer,

hou.StringParmTemplate("test", "Test", 1, string_type=hou.stringParmType.NodeReference)

but still can't figure out how to do the filtering.
anyone here? looking for some help