auto PredictOne(jxl::Predictor p, jxl::pixel_type_w left, jxl::pixel_type_w top, jxl::pixel_type_w toptop, jxl::pixel_type_w topleft, jxl::pixel_type_w topright, jxl::pixel_type_w leftleft, jxl::pixel_type_w toprightright, jxl::pixel_type_w wp_pred) -> jxl::pixel_type_w