question: public static PointSymbolizer createDefaultPointSymbolizer ( ) { String geometryFieldName = null ; Expression geometryField = ff . property ( geometryFieldName ) ; List < GraphicalSymbol > symbolList = new ArrayList < GraphicalSymbol > ( ) ; Stroke stroke = null ; AnchorPoint anchorPoint = null ; Displacement displacement = null ; Fill fill = styleFactory . createFill ( ff . literal ( DEFAULT_MARKER_COLOUR ) ) ; GraphicalSymbol symbol = styleFactory . mark ( ff . literal ( DEFAULT_MARKER_SYMBOL ) , fill , stroke ) ; symbolList . add ( symbol ) ; Graphic graphic = styleFactory . graphic ( symbolList , ff . literal ( DEFAULT_COLOUR_OPACITY ) , ff . literal ( DEFAULT_MARKER_SYMBOL_SIZE ) , ff . literal ( 0.0 ) , anchorPoint , displacement ) ; PointSymbolizer newPointSymbolizer = ( PointSymbolizer ) styleFactory . pointSymbolizer ( Localisation . getString ( SLDTreeTools . class , "TreeItem.newMarker" ) , geometryField , null , null , graphic ) ; return newPointSymbolizer ; }
target:  Creates the default point symbolizer.