about implementation of deformable psroi pooling

[wenhe-jia]

For deformable psroipooling, a deformable_psroi_pooling operator is used to generate offest from feature map, using feature map and rois as inputs; then another deformable_psroi_pooling operator is used to generate roi feature maps with feature map, offset and rois as inputs. I have read the cuda code of deformable_psroi_pooling.cu, it seems like when generating shifts(no_trans=True, no offset is set to sample bins), the deformable psroi pooling is a normal psroi pooling operation, so can we just use a psroi pooling operator to generate shifts from feature map, instead of deformable psroi pooling operator?