/*!
* @class MapperConfigSize
*
* @extends MapperSpec
*
* @headerfile <seqan/pipe.h>
*
* @brief Configuration of Mapper.
*
* @signature template <typename TMap, typename TSize[, typename TFile]> struct
* MapperConfigSize;
*
* @tparam TMap The destination function (see STL's <tt>unary_function</tt>).
* This functions maps a stream element to its destined position.
* The result type of this unary function should convertible to
* <tt>TSize</tt>.
* @tparam TFile The underlying File type, defaults to <tt>File<></tt>.
* @tparam TSize The Mapper's size type.
*
* @see MapperConfig
*/