proposition: Lemma sfun_measurable_fun_fubini_tonelli_G : measurable_fun setT G.
proof: Proof. rewrite sfun_fubini_tonelli_GE//; apply: emeasurable_fun_fsum => // r. exact/measurable_funeM/measurable_fun_ysection. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrnum ssrint interval finmap) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality fsbigop ) signed reals ereal topology normedtype sequences real_interval esum measure lebesgue_measure numfun