boundary of the body

[lxy-mini]

I want to get the boundary of the body. Can you give me some ideas? I want to get the boundary of the body to calculate whether it is contained by other parts. I saw related functions to obtain the boundary, but a label is required. Is the label here pre-generated?

   def get_boundary(self, i_label: str) -> Boundary:
        """
        .. note::
            :class: toggle

            CAA V5 Visual Basic Help (2020-07-06 14:02:20.222384))
                | o Func GetBoundary(CATBSTR iLabel) As Boundary
                | 
                |     Returns a boundary using its label.
                | 
                |     Parameters:
                | 
                |         iLabel
                |             Identification of the 
                | 
                |         Boundary object. See Reference.DisplayName. 
                |     Returns:
                |         The retrieved boundary

        :param str i_label:
        :rtype: Boundary
        """
        return Boundary(self.shapes.GetBoundary(i_label))

[lxy-mini]

In addition, the body has been encapsulated and no more details can be seen in CATIA.