src/transformers/models/lxmert/modeling_lxmert.py/LxmertXLayer/output_fc
class LxmertXLayer:    def output_fc(self, lang_input, visual_input):
        # FC layers
        lang_inter_output = self.lang_inter(lang_input)
        visual_inter_output = self.visn_inter(visual_input)

        # Layer output
        lang_output = self.lang_output(lang_inter_output, lang_input)
        visual_output = self.visn_output(visual_inter_output, visual_input)

        return lang_output, visual_output