std::unique_ptr< Process > createRichardsFlowProcess(std::string const &name, MeshLib::Mesh &mesh, std::unique_ptr< ProcessLib::AbstractJacobianAssembler > &&jacobian_assembler, std::vector< ProcessVariable > const &variables, std::vector< std::unique_ptr< ParameterLib::ParameterBase > > const ¶meters, unsigned const integration_order, BaseLib::ConfigTree const &config, std::map< int, std::shared_ptr< MaterialPropertyLib::Medium > > const &media)