This is used for filling multiple objects within the same element with different styles. This is done by adding multiple fillstyles to a FillArrray structure. The fillarray will then when requested return the 'next' fillstyle in sequential order. It is possible to specify ID tags to each fillstyle, which is used to make sure some data uses a specific fillstyle (i.e. in a multiple-/stackedbarchart you name the Image_Graph_Datasets and uses this name as ID tag when adding the dataset's associated fillstyle to the fillarray.
