diff --git a/RandLAPACK/drivers/rl_krillx.hh b/RandLAPACK/drivers/rl_krillx.hh
index c085329a..a986b9e5 100644
--- a/RandLAPACK/drivers/rl_krillx.hh
+++ b/RandLAPACK/drivers/rl_krillx.hh
@@ -24,14 +24,6 @@ namespace RandLAPACK {
 
 using std::vector;
 
-// TODO: make an interface for objects that be called as G(i,j)
-// or G.block_eval( ... arguments for computing submatrices of kernel matrices ... )
-//
-// ^ Maybe that'll just be an extension of the LinearOperator interface?
-//
-//   Uhh ... probably not, since that interface already has an operator() definition.
-//   maybe overloading saves us?
-
 template <typename T, typename FUNC, typename SEMINORM, typename STATE>
 STATE krill_separable_rpchol(
     int64_t n, FUNC &G, vector<T> &mus, vector<T> &H, vector<T> &X, T tol,
diff --git a/RandLAPACK/misc/rl_gen.hh b/RandLAPACK/misc/rl_gen.hh
index 07eb1b4a..5fba4817 100644
--- a/RandLAPACK/misc/rl_gen.hh
+++ b/RandLAPACK/misc/rl_gen.hh
@@ -532,5 +532,13 @@ void mat_gen(
             break;
     }
 }
+
+template <typename T, typename RNG>
+std::vector<T> mat_gen(mat_gen_info<T> &info, RandBLAS::RNGState<RNG> &state) {
+    std::vector<T> A(info.rows * info.cols, 0.0);
+    mat_gen(info, A.data(), state);
+    return A;
+}
+
 }
 #endif