ceres::internal::FixedArray -> absl::FixedArray Ceres Solver was using an old forked version of FixedArray, now that we are using absl, we can use the official version that ships with it. Change-Id: Ic88d7f6e8a49b928d611f7cbb04172452b322b01
Ceres Solver is an open source C++ library for modeling and solving large, complicated optimization problems. It is a feature rich, mature and performant library which has been used in production at Google since 2010. Ceres Solver can solve two kinds of problems.
Please see ceres-solver.org for more information.