/**
  @defgroup PDELab dune-pdelab

  @defgroup GridFunctionSpace Grid Function Space
  @ingroup  PDELab

    @defgroup FiniteElementMap Finite Element Map
    @ingroup  GridFunctionSpace

    @defgroup Ordering Ordering
    @ingroup  GridFunctionSpace

  @defgroup PDELab_Function PDELab Function
  @ingroup  PDELab

  @defgroup Operator Grid Operator
  @ingroup  PDELab

    @defgroup OneStepMethod One-step methods
    @ingroup  Operator

    @brief Time stepping with one step methods.

    Use the class OneStepMethod to create a one step method.
    the actual method is chosen by providing the constructor
    with the correct parameter class, e.g. ExplicitEulerParameter.

    @defgroup MultiStepMethods Multi-step methods
    @ingroup  Operator

  @defgroup Backend Backends
  @ingroup  PDELab
*/
