def METHOD_NAME(self):
    expert_classifiers = {}
    """
    Use pass-through features for 'rgb' or 'depth' single modalities,
    i.e., only create an expert classifier for multiple fused modalities
    """
    expert_classifiers["rgb_depth"] = torch.nn.Conv2d(
        2 * self.fus_in_channels, self.fus_out_channels, kernel_size=1, stride=1
    )
    return torch.nn.ModuleDict(expert_classifiers)