protected CategoryGraph(Wikipedia pWiki,Set<Integer> pPageIDs) throws WikiApiException {
  constructCategoryGraph(pWiki,pPageIDs,null);
}

protected CategoryGraph ( Wikipedia pWiki , Set < Integer > pPageIDs ) throws WikiApiException { constructCategoryGraph ( pWiki , pPageIDs , null ) ; }
creates a category graph using a subset ( that may also be the full set : ) of the categories .
