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fa633ed6 - refactor: move model helper function in pipeline to a mixin class (#6571)

refactor: move model helper function in pipeline to a mixin class (#6571) * move model helper function in pipeline to EfficiencyMixin --------- Co-authored-by: YiYi Xu <yixu310@gmail.com> Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>