[ ] Build automatic legend by introspecting the style elements, especially the expressions
e.g Expression colorExpression = new Expression("CASE WHEN TYPE='cereals' THEN '#ff6d6d' ELSE '#6d86ff' END ");
[ ] Think about an internal legend model that uses the style element to define a graphic legend object
[ ] Build automatic legend by introspecting the style elements, especially the expressions e.g Expression colorExpression = new Expression("CASE WHEN TYPE='cereals' THEN '#ff6d6d' ELSE '#6d86ff' END ");
[ ] Think about an internal legend model that uses the style element to define a graphic legend object