Add support for sortBy vendor option to ysld styling

Description

Hello, I have recently started using YSLD plugin of GeoServer.

I really love this feature as it makes me easy to create styles with complex filter functions and does not create unpredicted rules like CSS.

I have noticed that YSLD currently does not support vendor param sortBy for FeatureTypeStyle (http://docs.geoserver.org/latest/en/user/styling/sld/extensions/z-order/syntax.html).

It will be useful if it supports this param. For example I was visualising populations by circle radii in ysld and wanted to put small circles upon large ones.

I can get it around by using WMS's sortby param, but still wish to have it.

Thank you very much

Environment

None

Assignee

Unassigned

Reporter

Go Sato

Triage

None

Fix versions

None

Affects versions

Components

Priority

Low
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