Is there an Eigen C++ library equivalent to gsl_multifit_wlinear()?

I'm trying to port some older GSL code to using the header only Eigen library. I'm doing this as a side job for some data scientists and as such my math has lapsed a little since college. I'm trying to see if there's an equivalent function or module or even a more general linear algebra term for the gsl_multifit_wlinear() function call. It looks like a least-squares curve fitting function.I'm trying to port some older GSL code to using