.

        Layers of the same materials are combined to return one instance with the total thickness.

        Returns
        -------
        `dict`
            Entries are meterials with the total thickness for that material.
        &#34;&#34;&#34;
        material_thickness = dict()
        for name, layers in COMPONENTS.items():
            for material_name, thickness in layers:
                if material_name == &#39;solarblack&#39;:
                    material_name = self.solarblack
              