@author Daniel Lehmberg Processor counts number of pedestrians in a measurement area of any shape. To avoid unneccessary complicated structures this class does *not* extend from @AreaDensityProcessor (which requires an intern class or a separate class implementing the density algorithm). However, AreaDensityProcessor is a better description of what the processor does. See e.g. AreaDensityVoronoiProcessor / AreaDensityVoronoiAlgorithm