/**
 * @defgroup    grp_InnerSolvers Inner solvers
 * @ingroup grp_ALMSolver
 * @brief   Solvers for the inner problem, such as PANOC.
 */

/**
 * @defgroup    grp_PANOCDirectionProviders PANOC direction providers
 * @ingroup grp_InnerSolvers
 * @brief   Algorithms that provide quasi-Newton steps for the PANOC solver, 
 *          such as L-BFGS.
 */