Solution
There are 4 property type that is known in LabVIEW programming which are Standard, Deprecated, VI Scripting and Internal/Private.

Internal/Private Property is the property that should be used with caution. To be able to view internal or private classes/methods/properties, add key "SuperSecretPrivateSpecialStuff=True" to your LabVIEW.ini and restart LabVIEW.
To check what property that is classified as Internal/Private Property, you may refer to Category:Private Property - LabVIEW Wiki