def METHOD_NAME(self, obj):
    """Give the object properties unique to projects.
    Add the IFC context properties, and the group extension if it does not
    already exist.
    """
    ArchIFC.IfcContext.METHOD_NAME(self, obj)
    pl = obj.PropertiesList
    if not hasattr(obj,"Group"):
        obj.addExtension("App::GroupExtensionPython")
    self.Type = "Project"