added ProblemStatBasis interface functions to ProblemInstatBase

4 jobs for feature/global_refine in 35 minutes and 24 seconds (queued for 8 minutes and 14 seconds)
Status Job ID Name Coverage
  Test
passed #8190
debian:10 clang-6-libcpp-17

00:21:43

passed #8189
debian:10 gcc-8-17

00:15:21

passed #8191
debian:9 gcc-6-14

00:13:50

passed #8192
ubuntu:18.04 clang-6-17

00:20:00