Member hummingbird::CGProblem::Apply1DBCs (const Mesh &mesh, const Ordinate &ordinate, const BCBank &bc_bank, const size_t ordinate_index) override: Need to implement reflective BCs.
Member hummingbird::ParsedVolumetricSource::EvaluateAtNode (const Node &node, const Ordinate &ordinate) override: Add support for 2- and 3D angular functions (currently only supports mu-functions).
Member hummingbird::Segment::LocalStiffnessMatrix (const GaussLobattoLegendre &gll_quad, const MaterialBank &material_bank, const Ordinate &ordinate) override: See about cutting the loops in half by leveraging symmetry.

	hummingbird Solving the self-adjoint angular flux transport equation using spectral elements on Cartesian geometry