src/transformers/models/perceiver/modeling_perceiver.py/PerceiverMultimodalDecoder/num_query_channels
class PerceiverMultimodalDecoder:    def num_query_channels(self) -> int:
        max_channel_size = max(decoder.num_query_channels for _, decoder in self.modalities.items())
        common_channel_size = max_channel_size + self.min_padding_size
        return common_channel_size